It was a 19th century geologist who first recogni.pdf
•
0 likes•2 views
It was a 19th century geologist who first recognized periodicity in the physical properties of the elements. Alexandre Beguyer de Chancourtois (1820-1886), professor of geology at the School of Mines in Paris, published in 1862 a list of all the known elements. The list was constructed as a helical graph wrapped around a cylinder--elements with similar properties occupied positions on the same vertical line of cylinder (the list also included some ions and compounds). Using geological terms and published without the diagram, de Chancourtois ideas were completely ignored until the work of Mendeleev. it is used to distinguish elements by their properties Solution It was a 19th century geologist who first recognized periodicity in the physical properties of the elements. Alexandre Beguyer de Chancourtois (1820-1886), professor of geology at the School of Mines in Paris, published in 1862 a list of all the known elements. The list was constructed as a helical graph wrapped around a cylinder--elements with similar properties occupied positions on the same vertical line of cylinder (the list also included some ions and compounds). Using geological terms and published without the diagram, de Chancourtois ideas were completely ignored until the work of Mendeleev. it is used to distinguish elements by their properties.
Report
Share
Report
Share
Download to read offline
Recommended
Development of the periodic table
The document summarizes the development of the periodic table over time by various scientists from the 17th century to today. Dmitri Mendeleev produced one of the first recognizable periodic tables in 1869, arranging elements based on atomic weight and leaving gaps for undiscovered elements. Later, Henry Moseley determined that arranging elements by atomic number instead of weight gave a better organization, and scientists like Glenn Seaborg continued discovering new elements that were added to the table. The periodic table is now a fundamental tool that organizes all the known elements according to their atomic structure.
Tell A Story The Periodic Table
The development of the periodic table occurred over many decades as scientists discovered elements and recognized patterns in their properties. Early proposals included Dobereiner's law of triads in 1829 and Newlands' law of octaves in 1863. However, Dmitri Mendeleev is considered the father of the periodic table for his 1869 table that predicted undiscovered elements. Later, noble gases like argon were discovered and placed on the table. The modern periodic table was influenced by discoveries of atomic structure and isotopes that explained the periodic recurrence of properties.
DEVELOPMENT OF PERIODIC TABLE OF ELEMENTS.pptx
The document summarizes the key contributors to the development of the periodic table of elements from the 1600s to 1940s. It describes how scientists like Brand, Lavoisier, Dobereiner, de Chancourtois, Newlands, Meyer, Mendeleev, Moseley, and Seaborg arranged the known elements and contributed concepts and discoveries that led to the establishment of recurring trends in properties reflected by the modern periodic table. Their work established the periodic law stating that elements' properties repeat periodically with increasing atomic number.
History of the Periodic Table
This document provides a history of the development of the periodic table of elements from ancient Greek philosophers' idea of basic elements to modern structure. It describes early classifications by Lavoisier and Döbereiner and periodic law discoveries by Newlands and Mendeleev who arranged elements by atomic mass, allowing prediction of undiscovered elements. Later, Moseley introduced atomic number based on x-ray frequencies and Seaborg proposed a new lanthanide and actinide series placement based on electronic structure.
History Of Periodic Table
This document summarizes the history of the periodic table, beginning with Aristotle's theory of four elements in 330 BC. It then discusses key contributors such as Lavoisier, Berzelius, Dobereiner, Newlands, Meyer, and Mendeleev who developed early classifications and periodic tables of the elements in the 17th-19th centuries. The modern periodic table took shape in the early 20th century with discoveries like the noble gases, determination of atomic numbers, and transuranium elements. Many scientists collectively contributed to developing the systematic arrangement of elements now known as the periodic table.
Development of the Periodic Table
Chemists have always looked for ways of arranging the elements to reflect the similarities between their properties. The modern periodic table lists the elements in order of increasing atomic number (the number of protons in the nucleus of an atom). Historically, however, relative atomic masses were used by scientists trying to organise the elements. This was mainly because the idea of atoms being made up of smaller sub-atomic particles (protons, neutrons and electrons) had not been developed. Nevertheless, the basis of the modern periodic table was well established and even used to predict the
History And Development Of The Periodic Table
The periodic table is organized into blocks and groups based on elemental properties. The s, p, d blocks contain most elements including the alkali metals (Group 1), alkaline earth metals (Group 2), and halogens (Group 7). The f block contains the rare earth elements in the lanthanide and actinide series. Elements are categorized into families based on their valence electrons and chemical properties.
Johannes Hevelius 2
Johannes Hevelius was a Polish astronomer born in 1611. He built one of the largest observatories in Europe on the roof of his home in Danzig (now Gdansk, Poland). Through careful observation and building high-quality instruments, he produced the first detailed topographic study of the moon in his 1647 work Selenographie. He also observed and described comets in works like Prodromus Cometicus and Cometographia. Hevelius made significant contributions to astronomy through his detailed observations and studies of the moon, stars, comets, and other celestial bodies from his observatory in Gdansk.
Recommended
Development of the periodic table
The document summarizes the development of the periodic table over time by various scientists from the 17th century to today. Dmitri Mendeleev produced one of the first recognizable periodic tables in 1869, arranging elements based on atomic weight and leaving gaps for undiscovered elements. Later, Henry Moseley determined that arranging elements by atomic number instead of weight gave a better organization, and scientists like Glenn Seaborg continued discovering new elements that were added to the table. The periodic table is now a fundamental tool that organizes all the known elements according to their atomic structure.
Tell A Story The Periodic Table
The development of the periodic table occurred over many decades as scientists discovered elements and recognized patterns in their properties. Early proposals included Dobereiner's law of triads in 1829 and Newlands' law of octaves in 1863. However, Dmitri Mendeleev is considered the father of the periodic table for his 1869 table that predicted undiscovered elements. Later, noble gases like argon were discovered and placed on the table. The modern periodic table was influenced by discoveries of atomic structure and isotopes that explained the periodic recurrence of properties.
DEVELOPMENT OF PERIODIC TABLE OF ELEMENTS.pptx
The document summarizes the key contributors to the development of the periodic table of elements from the 1600s to 1940s. It describes how scientists like Brand, Lavoisier, Dobereiner, de Chancourtois, Newlands, Meyer, Mendeleev, Moseley, and Seaborg arranged the known elements and contributed concepts and discoveries that led to the establishment of recurring trends in properties reflected by the modern periodic table. Their work established the periodic law stating that elements' properties repeat periodically with increasing atomic number.
History of the Periodic Table
This document provides a history of the development of the periodic table of elements from ancient Greek philosophers' idea of basic elements to modern structure. It describes early classifications by Lavoisier and Döbereiner and periodic law discoveries by Newlands and Mendeleev who arranged elements by atomic mass, allowing prediction of undiscovered elements. Later, Moseley introduced atomic number based on x-ray frequencies and Seaborg proposed a new lanthanide and actinide series placement based on electronic structure.
History Of Periodic Table
This document summarizes the history of the periodic table, beginning with Aristotle's theory of four elements in 330 BC. It then discusses key contributors such as Lavoisier, Berzelius, Dobereiner, Newlands, Meyer, and Mendeleev who developed early classifications and periodic tables of the elements in the 17th-19th centuries. The modern periodic table took shape in the early 20th century with discoveries like the noble gases, determination of atomic numbers, and transuranium elements. Many scientists collectively contributed to developing the systematic arrangement of elements now known as the periodic table.
Development of the Periodic Table
Chemists have always looked for ways of arranging the elements to reflect the similarities between their properties. The modern periodic table lists the elements in order of increasing atomic number (the number of protons in the nucleus of an atom). Historically, however, relative atomic masses were used by scientists trying to organise the elements. This was mainly because the idea of atoms being made up of smaller sub-atomic particles (protons, neutrons and electrons) had not been developed. Nevertheless, the basis of the modern periodic table was well established and even used to predict the
History And Development Of The Periodic Table
The periodic table is organized into blocks and groups based on elemental properties. The s, p, d blocks contain most elements including the alkali metals (Group 1), alkaline earth metals (Group 2), and halogens (Group 7). The f block contains the rare earth elements in the lanthanide and actinide series. Elements are categorized into families based on their valence electrons and chemical properties.
Johannes Hevelius 2
Johannes Hevelius was a Polish astronomer born in 1611. He built one of the largest observatories in Europe on the roof of his home in Danzig (now Gdansk, Poland). Through careful observation and building high-quality instruments, he produced the first detailed topographic study of the moon in his 1647 work Selenographie. He also observed and described comets in works like Prodromus Cometicus and Cometographia. Hevelius made significant contributions to astronomy through his detailed observations and studies of the moon, stars, comets, and other celestial bodies from his observatory in Gdansk.
A history os science chapters 1,2,3
This document summarizes key events and discoveries in astronomy and paleontology from the 17th century to the early 20th century, including:
- Johannes Hevelius advanced astronomy in the 17th century by accurately describing features of the moon.
- In the 18th-19th centuries, astronomers like Halley, Bradley, and Euler made advances in understanding comets and celestial mechanics.
- In the 19th century, astronomers such as Bessel, Adams, Leverrier, and Galle made discoveries relating to asteroids and the planet Neptune.
- Developments like the spectroscope in the 19th century revolutionized astronomy by allowing the chemical analysis of stars and nebulae.
- In pale
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, aro.pdf
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, around the 400s BC, in
ancient Greece,they have used the words \"element\" and \"atom\" to describe the differences
between different parts of the material and to designate the smallest parts that make up matter.
In the eighteenth century, the great French chemist Antoine Lavoiser, in his \" \'Traité
élémentaire de Chimie (Elementary Treatise of Chemistry), published in 1789, divided the 33
elements known in his time, in four groups according to chemical properties: gases, non-metals,
metals, and earth. In the nineteenth century, in 1869 German scientist Johann Döbereiner noted
that similar elements have similar atomic masses. He eleborat the so-called Law of triads which
consist of dividing the items into groups of three similar elements, the middle element properties
being deduced from the properties of the most difficult element and the easiest item. Examples
of triads in this table: lithium, sodium and potassium, sulfur, selenium and tellurium and
chlorine, bromine and iod.Cercetatorul French Chancourtois made a cylindrical table of elements
to show a periodic recurrence properties of chemical elements. In 1865, another researcher who
attempted classification of items was Englishman John Newlands, professor in the School of
Medicine in London. He placed the items in a table consists of 7 columns in order of increasing
atomic mass. He pointed out that elements with similar properties occur at intervals of 8
elements and eleborat so-called Law of octaves. Other contributions to the classification of
chemical elements, were also brought by English scientist William Olding, in 1864 and German
scientist Julius Lothar Meyer in 1868. W. Olding has made a table very similar to that made
later by Mendeleev. The groups are arranged horizontally and the elements are arranged in order
of atomic mass. In the tables were left blanks for undiscovered elements. German chemist Julius
Lothar Meyer made a table of chemical elements in 1864, then a second version in 1868, where
the elements were arranged in order of atomic mass. Mayer published his work much later than
Mendeleev, so could not prevail in this area. It seems that the two chemists, Meyer and
Mendeleev discovered the periodic system of elements simultaneously. He who is widely
accepted as the discoverer of the periodic system of elements was modern Russian chemist
Dmitri Ivanovich Mendeleev. The final version of the system periodically in 1871 has left spaces
suggesting that other chemical elements will be discovered later. Element 101 was named after
Dmitri Ivanovich Mendeleev (1834-1907), who discovered the \"Periodic System\" arranged in
tabular form and continuously improved between 1868 and 1871.
Solution
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, around the 400s BC, in
ancient Greece,they have used the words \"element\" and \"atom\" to describe the differences
between different parts of the material and .
Scientists
- Johannes Kepler established that planets orbit the sun in ellipses rather than perfect circles, with the sun located at one focus. Galileo Galilei provided further evidence for the heliocentric model through his astronomical observations with one of the first telescopes.
- Isaac Newton later explained the motions of the planets through his universal law of gravitation and laws of motion. This established a basis for further exploration of celestial mechanics by astronomers like Pierre-Simon Laplace.
- Major 18th century contributors to celestial mechanics included Leonhard Euler, Joseph-Louis Lagrange, and Pierre-Simon Laplace, who further developed and applied Newton's law of gravitation to better understand planetary motions.
History Of Astronomy
Astronomy is one of the oldest sciences, with early civilizations like those in ancient China and at Stonehenge making careful records of astronomical phenomena. The field advanced significantly with Greek philosophers and scientists developing early mathematical models. Claudius Ptolemy created an influential geocentric model of the Solar System in his work The Almagest. Later, Nicolaus Copernicus developed the first heliocentric model placing the Sun at the center. Johannes Kepler then established his three laws of planetary motion, and Isaac Newton later formulated his law of universal gravitation and invented calculus, greatly advancing our understanding of astronomy.
Welcome @
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to predict properties of undiscovered elements, establishing the basis for the modern periodic table.
- Moseley later modified the periodic law to state that properties depend on atomic number rather than atomic mass, bringing the periodic table to its modern form.
Welcome @
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to predict properties of undiscovered elements, establishing the basis for the modern periodic table.
- Moseley later modified the periodic law to state that properties depend on atomic number rather than atomic mass, bringing the periodic table to its modern form.
ppt(
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to correctly predict properties of undiscovered elements.
- The modern periodic table, established by Moseley, arranges elements by atomic number rather than atomic mass, providing the foundation for studying chemistry systematically.
welcome @
- The document discusses the early attempts to classify elements, including by Lavoisier, Dobereiner, and Newlands. It then focuses on Mendeleev's periodic table from 1869, which arranged elements by atomic mass and allowed for predictions of undiscovered elements.
- The modern periodic table, developed based on Moseley's work relating element properties to atomic number rather than mass, is now used. It represents an improved understanding of periodic trends and the atomic-level basis for element properties.
powerpoint
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to correctly predict properties of undiscovered elements.
- The modern periodic table, established by Moseley, arranges elements by atomic number rather than atomic mass, providing the foundation for studying chemistry systematically.
Line time
1) Johannes Kepler discovered the three laws of planetary motion which described how planets move around the sun.
2) Sir Isaac Newton discovered the law of universal gravitation and formulated the laws of motion, laying the foundations of classical mechanics.
3) Anders Celsius developed the Celsius temperature scale used today.
Chemistry 21st century.ppt
This document provides a history of chemistry from ancient Greece to the 21st century. It discusses how chemistry originated from Aristotle's theory of four elements of earth, water, air and fire. Key developments included Georg Agricola's work on mining and metallurgy in the 16th century, Robert Boyle's experimental methods in the 17th century, Lavoisier's discoveries on combustion and being the "Father of Modern Chemistry" in the 18th century, Dalton's atomic theory and the law of conservation of energy in the 19th century, and discoveries of the atomic nucleus, neutron and superconductivity leading into the 21st century. The document traces the major advances in chemistry over the centuries.
4.1
1. The modern periodic table evolved over time through the work of multiple scientists in the 19th century who organized the known elements in different ways.
2. Mendeleev published one of the first recognizable periodic tables in 1869, arranging elements by atomic mass and leaving spaces for undiscovered elements.
3. Mendeleev's predictions about three unknown elements were later confirmed, supporting his periodic law and establishing him as the father of the periodic table.
The periodic table
The periodic table arranges the chemical elements in order of atomic number so that elements with similar properties fall into columns known as groups. The standard periodic table includes periods (horizontal rows) and groups (vertical columns), with elements in the same group having similar properties. Dmitri Mendeleev is credited with developing the first recognizable periodic table in 1869, arranging the known elements based on their atomic masses and properties. While earlier scientists like Lavoisier and Döbereiner identified patterns among elements, Mendeleev's periodic table was the first to systematically organize all known elements and also predict properties of undiscovered elements.
Ancient mathematics
Archimedes made several important mathematical discoveries, including determining that the surface area of a sphere is 2/3 that of a cylinder with the same diameter. He also invented war machines, including a claw that could lift ships out of the water. Taking a bath one day, Archimedes noticed that the water level rose as he got in, inspiring his principle of buoyancy, which he ran through the streets naked announcing his discovery.
Presentation1 Chemistry
The document provides information about the periodic table and its history. It describes how Hennig Brand discovered phosphorus in 1649. Julius Lothar Meyer developed one of the first periodic tables in 1862 organizing elements into families based on valence. Dmitri Mendeleev created the first recognizable modern periodic table in 1869, arranging elements by atomic mass and predicting new elements. Henry Moseley observed that atomic number varied periodically, establishing it as the basis of classification in 1914. The rest of the document defines periodic table terms and provides facts about common elements.
Science in 18 th century
In the 18th century, important advances were made in chemistry and biology. Antoine Lavoisier discovered the role of oxygen in combustion and respiration. Two influential biologists were Comte De Buffon and Carolus Linnaeus, who developed early methods of classifying living things. In the 19th century, science progressed rapidly with discoveries like atomic theory by John Dalton, the isolation of elements like aluminum, and Charles Darwin's theory of evolution in Origin of Species. Important physicists included James Clerk Maxwell, Marie and Pierre Curie, and Joseph Thomson. The 20th century saw the discoveries of subatomic particles, nuclear fission, DNA structure, and breakthroughs in physics including quantum theory, relativity, and the discovery of Pl
Development of the periodic table
Alchemists in the Middle Ages first introduced symbols for elements, which influenced modern chemists' use of symbols for convenience. Jons Jacob Berzelius invented the current system of chemical symbols. Elements' symbols are derived from their names in Latin, English, or the scientists who discovered them. Henry Moseley's work with X-ray spectra showed that atomic number, not mass, determines an element's position in the periodic table. This led to restating the periodic law in terms of atomic number and the modern form of the periodic table.
Personalities who contributed to the advancements of the universe
This document profiles several influential astronomers throughout history and their contributions, including Abd al-Rahman al-Sufi who observed the Andromeda galaxy, Copernicus who proposed the heliocentric model of the solar system, and Kepler who determined planets orbit in ellipses rather than circles. It also discusses Galileo, Newton, Einstein, Hubble, Sagan, Hawking, and others who expanded our understanding of the universe.
telescope_genesis_en.ppt
The telescope was invented in the early 17th century, first by Hans Lippershey and later improved by Galileo Galilei, who used it to make groundbreaking observations of the moon, Jupiter's moons, and sunspots. Early telescopic observations revealed that the celestial bodies were not perfect spheres as previously thought, sparking a scientific revolution and overturning Aristotelian physics and astronomy.
Famous scientists
The document profiles several famous scientists throughout history including Albert Einstein, Isaac Newton, Galileo Galilei, Stephen Hawking, Nikola Tesla, Charles Darwin, Archimedes, Marie Curie, and Leonardo da Vinci. It provides brief biographies of each scientist, highlighting their most important scientific works and contributions to fields like physics, astronomy, mathematics, engineering, and biology. Key accomplishments mentioned include Einstein's theory of relativity, Newton's laws of motion, Galileo's astronomical observations, Hawking's work on black holes and cosmology, Tesla's inventions related to electricity, Darwin's theory of evolution by natural selection, Archimedes' contributions to geometry and calculations, Curie's pioneering research on radioactivity, and da Vin
Given the evidence available at the time (early 1800s) nothing was.pdf
Given the evidence available at the time (early 1800\'s) nothing was wrong with Dalton\'s
theory. It accounted for the variations among elements, their relative masses, the observed
conservation of mass, and the observations made by earlier scientists about the proportions of
elements found in compounds. Dalton did conjecture that atoms somehow stuck together to make
compounds, but he couldn\'t explain how. It was only much later that electrons were discovered,
showing that atoms weren\'t indestructible solid objects, and later still that it was shown that
atoms had a specific internal structure, the exact nature of which is still under investigation.
None of these discoveries invalidate Dalton\'s atomic theory -- they expand and enrich it.
Dalton\'s theory did exactly what good scientific theories do -- explain and relate existing
evidence, and provide a foundation for further inquiry.
Solution
Given the evidence available at the time (early 1800\'s) nothing was wrong with Dalton\'s
theory. It accounted for the variations among elements, their relative masses, the observed
conservation of mass, and the observations made by earlier scientists about the proportions of
elements found in compounds. Dalton did conjecture that atoms somehow stuck together to make
compounds, but he couldn\'t explain how. It was only much later that electrons were discovered,
showing that atoms weren\'t indestructible solid objects, and later still that it was shown that
atoms had a specific internal structure, the exact nature of which is still under investigation.
None of these discoveries invalidate Dalton\'s atomic theory -- they expand and enrich it.
Dalton\'s theory did exactly what good scientific theories do -- explain and relate existing
evidence, and provide a foundation for further inquiry..
1. Enzymatic digestion of proteins in to amino acids by pepsin.3. .pdf
1. Enzymatic digestion of proteins in to amino acids by pepsin.
3. Secretion of bile.
4. Enzymatic digestion of triglycerides to fatty acids and glycerol by gastric lipase.
8. Secretion of HCl.
Solution
1. Enzymatic digestion of proteins in to amino acids by pepsin.
3. Secretion of bile.
4. Enzymatic digestion of triglycerides to fatty acids and glycerol by gastric lipase.
8. Secretion of HCl..
More Related Content
Similar to It was a 19th century geologist who first recogni.pdf
A history os science chapters 1,2,3
This document summarizes key events and discoveries in astronomy and paleontology from the 17th century to the early 20th century, including:
- Johannes Hevelius advanced astronomy in the 17th century by accurately describing features of the moon.
- In the 18th-19th centuries, astronomers like Halley, Bradley, and Euler made advances in understanding comets and celestial mechanics.
- In the 19th century, astronomers such as Bessel, Adams, Leverrier, and Galle made discoveries relating to asteroids and the planet Neptune.
- Developments like the spectroscope in the 19th century revolutionized astronomy by allowing the chemical analysis of stars and nebulae.
- In pale
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, aro.pdf
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, around the 400s BC, in
ancient Greece,they have used the words \"element\" and \"atom\" to describe the differences
between different parts of the material and to designate the smallest parts that make up matter.
In the eighteenth century, the great French chemist Antoine Lavoiser, in his \" \'Traité
élémentaire de Chimie (Elementary Treatise of Chemistry), published in 1789, divided the 33
elements known in his time, in four groups according to chemical properties: gases, non-metals,
metals, and earth. In the nineteenth century, in 1869 German scientist Johann Döbereiner noted
that similar elements have similar atomic masses. He eleborat the so-called Law of triads which
consist of dividing the items into groups of three similar elements, the middle element properties
being deduced from the properties of the most difficult element and the easiest item. Examples
of triads in this table: lithium, sodium and potassium, sulfur, selenium and tellurium and
chlorine, bromine and iod.Cercetatorul French Chancourtois made a cylindrical table of elements
to show a periodic recurrence properties of chemical elements. In 1865, another researcher who
attempted classification of items was Englishman John Newlands, professor in the School of
Medicine in London. He placed the items in a table consists of 7 columns in order of increasing
atomic mass. He pointed out that elements with similar properties occur at intervals of 8
elements and eleborat so-called Law of octaves. Other contributions to the classification of
chemical elements, were also brought by English scientist William Olding, in 1864 and German
scientist Julius Lothar Meyer in 1868. W. Olding has made a table very similar to that made
later by Mendeleev. The groups are arranged horizontally and the elements are arranged in order
of atomic mass. In the tables were left blanks for undiscovered elements. German chemist Julius
Lothar Meyer made a table of chemical elements in 1864, then a second version in 1868, where
the elements were arranged in order of atomic mass. Mayer published his work much later than
Mendeleev, so could not prevail in this area. It seems that the two chemists, Meyer and
Mendeleev discovered the periodic system of elements simultaneously. He who is widely
accepted as the discoverer of the periodic system of elements was modern Russian chemist
Dmitri Ivanovich Mendeleev. The final version of the system periodically in 1871 has left spaces
suggesting that other chemical elements will be discovered later. Element 101 was named after
Dmitri Ivanovich Mendeleev (1834-1907), who discovered the \"Periodic System\" arranged in
tabular form and continuously improved between 1868 and 1871.
Solution
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, around the 400s BC, in
ancient Greece,they have used the words \"element\" and \"atom\" to describe the differences
between different parts of the material and .
Scientists
- Johannes Kepler established that planets orbit the sun in ellipses rather than perfect circles, with the sun located at one focus. Galileo Galilei provided further evidence for the heliocentric model through his astronomical observations with one of the first telescopes.
- Isaac Newton later explained the motions of the planets through his universal law of gravitation and laws of motion. This established a basis for further exploration of celestial mechanics by astronomers like Pierre-Simon Laplace.
- Major 18th century contributors to celestial mechanics included Leonhard Euler, Joseph-Louis Lagrange, and Pierre-Simon Laplace, who further developed and applied Newton's law of gravitation to better understand planetary motions.
History Of Astronomy
Astronomy is one of the oldest sciences, with early civilizations like those in ancient China and at Stonehenge making careful records of astronomical phenomena. The field advanced significantly with Greek philosophers and scientists developing early mathematical models. Claudius Ptolemy created an influential geocentric model of the Solar System in his work The Almagest. Later, Nicolaus Copernicus developed the first heliocentric model placing the Sun at the center. Johannes Kepler then established his three laws of planetary motion, and Isaac Newton later formulated his law of universal gravitation and invented calculus, greatly advancing our understanding of astronomy.
Welcome @
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to predict properties of undiscovered elements, establishing the basis for the modern periodic table.
- Moseley later modified the periodic law to state that properties depend on atomic number rather than atomic mass, bringing the periodic table to its modern form.
Welcome @
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to predict properties of undiscovered elements, establishing the basis for the modern periodic table.
- Moseley later modified the periodic law to state that properties depend on atomic number rather than atomic mass, bringing the periodic table to its modern form.
ppt(
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to correctly predict properties of undiscovered elements.
- The modern periodic table, established by Moseley, arranges elements by atomic number rather than atomic mass, providing the foundation for studying chemistry systematically.
welcome @
- The document discusses the early attempts to classify elements, including by Lavoisier, Dobereiner, and Newlands. It then focuses on Mendeleev's periodic table from 1869, which arranged elements by atomic mass and allowed for predictions of undiscovered elements.
- The modern periodic table, developed based on Moseley's work relating element properties to atomic number rather than mass, is now used. It represents an improved understanding of periodic trends and the atomic-level basis for element properties.
powerpoint
- The document discusses the early history and development of the periodic table, from early attempts at classification by Lavoisier and Dobereiner to the establishment of periodic law by Mendeleev.
- Mendeleev arranged the elements in order of atomic mass and was able to correctly predict properties of undiscovered elements.
- The modern periodic table, established by Moseley, arranges elements by atomic number rather than atomic mass, providing the foundation for studying chemistry systematically.
Line time
1) Johannes Kepler discovered the three laws of planetary motion which described how planets move around the sun.
2) Sir Isaac Newton discovered the law of universal gravitation and formulated the laws of motion, laying the foundations of classical mechanics.
3) Anders Celsius developed the Celsius temperature scale used today.
Chemistry 21st century.ppt
This document provides a history of chemistry from ancient Greece to the 21st century. It discusses how chemistry originated from Aristotle's theory of four elements of earth, water, air and fire. Key developments included Georg Agricola's work on mining and metallurgy in the 16th century, Robert Boyle's experimental methods in the 17th century, Lavoisier's discoveries on combustion and being the "Father of Modern Chemistry" in the 18th century, Dalton's atomic theory and the law of conservation of energy in the 19th century, and discoveries of the atomic nucleus, neutron and superconductivity leading into the 21st century. The document traces the major advances in chemistry over the centuries.
4.1
1. The modern periodic table evolved over time through the work of multiple scientists in the 19th century who organized the known elements in different ways.
2. Mendeleev published one of the first recognizable periodic tables in 1869, arranging elements by atomic mass and leaving spaces for undiscovered elements.
3. Mendeleev's predictions about three unknown elements were later confirmed, supporting his periodic law and establishing him as the father of the periodic table.
The periodic table
The periodic table arranges the chemical elements in order of atomic number so that elements with similar properties fall into columns known as groups. The standard periodic table includes periods (horizontal rows) and groups (vertical columns), with elements in the same group having similar properties. Dmitri Mendeleev is credited with developing the first recognizable periodic table in 1869, arranging the known elements based on their atomic masses and properties. While earlier scientists like Lavoisier and Döbereiner identified patterns among elements, Mendeleev's periodic table was the first to systematically organize all known elements and also predict properties of undiscovered elements.
Ancient mathematics
Archimedes made several important mathematical discoveries, including determining that the surface area of a sphere is 2/3 that of a cylinder with the same diameter. He also invented war machines, including a claw that could lift ships out of the water. Taking a bath one day, Archimedes noticed that the water level rose as he got in, inspiring his principle of buoyancy, which he ran through the streets naked announcing his discovery.
Presentation1 Chemistry
The document provides information about the periodic table and its history. It describes how Hennig Brand discovered phosphorus in 1649. Julius Lothar Meyer developed one of the first periodic tables in 1862 organizing elements into families based on valence. Dmitri Mendeleev created the first recognizable modern periodic table in 1869, arranging elements by atomic mass and predicting new elements. Henry Moseley observed that atomic number varied periodically, establishing it as the basis of classification in 1914. The rest of the document defines periodic table terms and provides facts about common elements.
Science in 18 th century
In the 18th century, important advances were made in chemistry and biology. Antoine Lavoisier discovered the role of oxygen in combustion and respiration. Two influential biologists were Comte De Buffon and Carolus Linnaeus, who developed early methods of classifying living things. In the 19th century, science progressed rapidly with discoveries like atomic theory by John Dalton, the isolation of elements like aluminum, and Charles Darwin's theory of evolution in Origin of Species. Important physicists included James Clerk Maxwell, Marie and Pierre Curie, and Joseph Thomson. The 20th century saw the discoveries of subatomic particles, nuclear fission, DNA structure, and breakthroughs in physics including quantum theory, relativity, and the discovery of Pl
Development of the periodic table
Alchemists in the Middle Ages first introduced symbols for elements, which influenced modern chemists' use of symbols for convenience. Jons Jacob Berzelius invented the current system of chemical symbols. Elements' symbols are derived from their names in Latin, English, or the scientists who discovered them. Henry Moseley's work with X-ray spectra showed that atomic number, not mass, determines an element's position in the periodic table. This led to restating the periodic law in terms of atomic number and the modern form of the periodic table.
Personalities who contributed to the advancements of the universe
This document profiles several influential astronomers throughout history and their contributions, including Abd al-Rahman al-Sufi who observed the Andromeda galaxy, Copernicus who proposed the heliocentric model of the solar system, and Kepler who determined planets orbit in ellipses rather than circles. It also discusses Galileo, Newton, Einstein, Hubble, Sagan, Hawking, and others who expanded our understanding of the universe.
telescope_genesis_en.ppt
The telescope was invented in the early 17th century, first by Hans Lippershey and later improved by Galileo Galilei, who used it to make groundbreaking observations of the moon, Jupiter's moons, and sunspots. Early telescopic observations revealed that the celestial bodies were not perfect spheres as previously thought, sparking a scientific revolution and overturning Aristotelian physics and astronomy.
Famous scientists
The document profiles several famous scientists throughout history including Albert Einstein, Isaac Newton, Galileo Galilei, Stephen Hawking, Nikola Tesla, Charles Darwin, Archimedes, Marie Curie, and Leonardo da Vinci. It provides brief biographies of each scientist, highlighting their most important scientific works and contributions to fields like physics, astronomy, mathematics, engineering, and biology. Key accomplishments mentioned include Einstein's theory of relativity, Newton's laws of motion, Galileo's astronomical observations, Hawking's work on black holes and cosmology, Tesla's inventions related to electricity, Darwin's theory of evolution by natural selection, Archimedes' contributions to geometry and calculations, Curie's pioneering research on radioactivity, and da Vin
Similar to It was a 19th century geologist who first recogni.pdf (20)
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, aro.pdf
giorgiana1976 Teacher Doctorate Debater, Expert Since antiquity, aro.pdf
Personalities who contributed to the advancements of the universe
Personalities who contributed to the advancements of the universe
More from navyugenterprisesdoo
Given the evidence available at the time (early 1800s) nothing was.pdf
Given the evidence available at the time (early 1800\'s) nothing was wrong with Dalton\'s
theory. It accounted for the variations among elements, their relative masses, the observed
conservation of mass, and the observations made by earlier scientists about the proportions of
elements found in compounds. Dalton did conjecture that atoms somehow stuck together to make
compounds, but he couldn\'t explain how. It was only much later that electrons were discovered,
showing that atoms weren\'t indestructible solid objects, and later still that it was shown that
atoms had a specific internal structure, the exact nature of which is still under investigation.
None of these discoveries invalidate Dalton\'s atomic theory -- they expand and enrich it.
Dalton\'s theory did exactly what good scientific theories do -- explain and relate existing
evidence, and provide a foundation for further inquiry.
Solution
Given the evidence available at the time (early 1800\'s) nothing was wrong with Dalton\'s
theory. It accounted for the variations among elements, their relative masses, the observed
conservation of mass, and the observations made by earlier scientists about the proportions of
elements found in compounds. Dalton did conjecture that atoms somehow stuck together to make
compounds, but he couldn\'t explain how. It was only much later that electrons were discovered,
showing that atoms weren\'t indestructible solid objects, and later still that it was shown that
atoms had a specific internal structure, the exact nature of which is still under investigation.
None of these discoveries invalidate Dalton\'s atomic theory -- they expand and enrich it.
Dalton\'s theory did exactly what good scientific theories do -- explain and relate existing
evidence, and provide a foundation for further inquiry..
1. Enzymatic digestion of proteins in to amino acids by pepsin.3. .pdf
1. Enzymatic digestion of proteins in to amino acids by pepsin.
3. Secretion of bile.
4. Enzymatic digestion of triglycerides to fatty acids and glycerol by gastric lipase.
8. Secretion of HCl.
Solution
1. Enzymatic digestion of proteins in to amino acids by pepsin.
3. Secretion of bile.
4. Enzymatic digestion of triglycerides to fatty acids and glycerol by gastric lipase.
8. Secretion of HCl..
1. Assume that those DNA molecules are same in length as well as in .pdf
1. Assume that those DNA molecules are same in length as well as in other properities such as
supercoiling...etc, in gel after electrophoresis, we can observe one thick band.
2. As DNA is -vely charged molecules due to P- ions, if the electrodes connects in wrong
direction, it won\'t enter in to gel. Those molecules sometimes may migrate to buffer chambers.
Solution
1. Assume that those DNA molecules are same in length as well as in other properities such as
supercoiling...etc, in gel after electrophoresis, we can observe one thick band.
2. As DNA is -vely charged molecules due to P- ions, if the electrodes connects in wrong
direction, it won\'t enter in to gel. Those molecules sometimes may migrate to buffer chambers..
Try to save the file using .vbs extension rather than .wsfType thi.pdf
Try to save the file using .vbs extension rather than .wsf
Type this in notepad and save the file as SHutdownReminder.vbs and add this file into local
group policy.
Solution
Try to save the file using .vbs extension rather than .wsf
Type this in notepad and save the file as SHutdownReminder.vbs and add this file into local
group policy..
There are two types of respirationAerobic respiration takes plac.pdf
There are two types of respiration:
Aerobic respiration: takes place in presence of Oxygen to produce ATP. The electron transport
chain helps to convert NADH and FADH2 in to ATP. Most of the ATP produced by cellular
respiration are made with the help of Oxidative phosphorylation.
Anaerobic respiration where electron acceptors are other than oxygen .In anaerobes less
oxidizing agents are used such as nitrates where substrate level phosphorylation is used to
produce ATP.
Based on the above descriptions, the correct answers are:
a. Aerobic respiration: Substrate level phosphorylation
b. Anaerobic respiration with nitrate used as the terminal electron acceptor: Substrate level
phosphorylation
c. Embden Meyerhoff pathway for glucose catabolism: Oxidative phosphorylation
d. Anaerobic respiration with iron used as the terminal electon acceptor: Substrate level
phosphorylation
Solution
There are two types of respiration:
Aerobic respiration: takes place in presence of Oxygen to produce ATP. The electron transport
chain helps to convert NADH and FADH2 in to ATP. Most of the ATP produced by cellular
respiration are made with the help of Oxidative phosphorylation.
Anaerobic respiration where electron acceptors are other than oxygen .In anaerobes less
oxidizing agents are used such as nitrates where substrate level phosphorylation is used to
produce ATP.
Based on the above descriptions, the correct answers are:
a. Aerobic respiration: Substrate level phosphorylation
b. Anaerobic respiration with nitrate used as the terminal electron acceptor: Substrate level
phosphorylation
c. Embden Meyerhoff pathway for glucose catabolism: Oxidative phosphorylation
d. Anaerobic respiration with iron used as the terminal electon acceptor: Substrate level
phosphorylation.
The triangle DEF -- TRIANGLE HIG is a glide reflection.Reflection.pdf
The triangle DEF --> TRIANGLE HIG is a glide reflection.
Reflection line:
Each point of a reflected image is the same distance from the line of reflection as the
corresponding point of the original figure. In other words, the line of reflection lies directly in the
middle between the figure and its image -- it is the perpendicular bisector of the segment joining
any point to its image.
The reflection line = IG
Translation rule:
The translation rule is shift.
Shifts
A shift is a rigid translation in that it does not change the shape or size of the graph of the
function. All that a shift will do is change the location of the graph. A vertical shift
adds/subtracts a constant to/from every y-coordinate while leaving the x-coordinate unchanged.
A horizontal shift adds/subtracts a constant to/from every x-coordinate while leaving the y-
coordinate unchanged. Vertical and horizontal shifts can be combined into one expression.
Shifts are added/subtracted to the x or f(x) components. If the constant is grouped with the x,
then it is a horizontal shift, otherwise it is a vertical shift.
center and angle of rotation:
Glide translation rule:and reflection line:
When a translation (a slide or glide) and a reflection are performed one after the other, a
transformation called a glide reflection is produced. In a glide reflection, the line of reflection is
parallel to the direction of the translation. It does not matter whether you glide first and then
reflect, or reflect first and then glide. This transformation is commutative.
When two or more transformations are combined to form a new transformation, the result is
called a composition of transformations. Since translations and reflections are both isometries, a
glide reflection is also an isometry.
Solution
The triangle DEF --> TRIANGLE HIG is a glide reflection.
Reflection line:
Each point of a reflected image is the same distance from the line of reflection as the
corresponding point of the original figure. In other words, the line of reflection lies directly in the
middle between the figure and its image -- it is the perpendicular bisector of the segment joining
any point to its image.
The reflection line = IG
Translation rule:
The translation rule is shift.
Shifts
A shift is a rigid translation in that it does not change the shape or size of the graph of the
function. All that a shift will do is change the location of the graph. A vertical shift
adds/subtracts a constant to/from every y-coordinate while leaving the x-coordinate unchanged.
A horizontal shift adds/subtracts a constant to/from every x-coordinate while leaving the y-
coordinate unchanged. Vertical and horizontal shifts can be combined into one expression.
Shifts are added/subtracted to the x or f(x) components. If the constant is grouped with the x,
then it is a horizontal shift, otherwise it is a vertical shift.
center and angle of rotation:
Glide translation rule:and reflection line:
When a translation (a slide or glide) and a reflectio.
The process of making a chip begins with sand. Sand contains 25 sil.pdf
The process of making a chip begins with sand. Sand contains 25% silicon by mass. Sand
especially Quartz contains high percentage of Silicon dioxide which is the basic ingredient of
semiconductor manufacturing.
Silicon is purified in multiple stages to obtain the quality called Electronic Grade Silicon in the
form of Ingots. Ingots are big mono crystals. Mono crystal Silicon Ingots have highly pure
silicon of purity 99.99%.
The Ingots are cut into individual silicon discs or slices called wafers. These wafers are polished
untile mirror smooth surfaces are obtained. A photo resis layer is applied by rotating the wafers.
Wafers are rotated for an even finish. The photo resist finish is exposed to ultra violet light which
triggers a chemical reaction which transforms the photo resist to a soluble . UV light exposure is
for creating various circuit patterns on the wafer.
Solvents are used to clean out the Photo resist to reveal the patterns. made using UV light.
Unwanted material is removed by etching.
Ion implantation is done by bombarding the various chemical impurities called Ions. Ions are
implanted by shooting them onto the surface with a very high speed of over 3 x 10^5 km/h. The
wafers are put into a copper sulphate solution . As a result the copper ions are deposited onto the
transistor through a process called electroplating. The copper ions settle as a thin layer of copper
and the excess material is polished off.
Multiple metal layers are created to interconnect. the architecture and design is dependent on the
functionality of the transistor or part in which the chip has to work. Functionality tests are done
to evaluate the response of every single chip. Wafers are cut into pieces. Furthermore , the
defaulty pieces are discarded off. Groups of pieces are arranged to cater for the respective
functionality. Hence , the procedure for sand to chip
Solution
The process of making a chip begins with sand. Sand contains 25% silicon by mass. Sand
especially Quartz contains high percentage of Silicon dioxide which is the basic ingredient of
semiconductor manufacturing.
Silicon is purified in multiple stages to obtain the quality called Electronic Grade Silicon in the
form of Ingots. Ingots are big mono crystals. Mono crystal Silicon Ingots have highly pure
silicon of purity 99.99%.
The Ingots are cut into individual silicon discs or slices called wafers. These wafers are polished
untile mirror smooth surfaces are obtained. A photo resis layer is applied by rotating the wafers.
Wafers are rotated for an even finish. The photo resist finish is exposed to ultra violet light which
triggers a chemical reaction which transforms the photo resist to a soluble . UV light exposure is
for creating various circuit patterns on the wafer.
Solvents are used to clean out the Photo resist to reveal the patterns. made using UV light.
Unwanted material is removed by etching.
Ion implantation is done by bombarding the various chemical impurities called Ions. Ions ar.
The Permian Period was the ultimate period of the Paleozoic Era whic.pdf
The Permian Period was the ultimate period of the Paleozoic Era which lasted from 299 million
to 251 million years ago.It preceded the Triassic Period. The evolutionary innovations of seed
and pollen are as follows.
The giant swamp forests began to dry out totally. The mossy plants that depended on spores for
reproduction were being replaced by the the gymnosperms which were the first seed-bearing
plants. They are vascular plants, that transport water internally. They have exposed seeds that
develop on the scales of cones and are fertilized when pollen sifts down and lands directly on the
seed. Today’s conifers are gymnosperms, as are the short palm like cycads.
Solution
The Permian Period was the ultimate period of the Paleozoic Era which lasted from 299 million
to 251 million years ago.It preceded the Triassic Period. The evolutionary innovations of seed
and pollen are as follows.
The giant swamp forests began to dry out totally. The mossy plants that depended on spores for
reproduction were being replaced by the the gymnosperms which were the first seed-bearing
plants. They are vascular plants, that transport water internally. They have exposed seeds that
develop on the scales of cones and are fertilized when pollen sifts down and lands directly on the
seed. Today’s conifers are gymnosperms, as are the short palm like cycads..
RNs role in kidney transplant recipient in the immediate post-operat.pdf
RNs role in kidney transplant recipient in the immediate post-operative period;
RN\'s role in organ transplantation to assess, plan, implement, practice evidence based approach
to evaluate care interventions in the care of the transplant patient . To analyse the biological,
psychological and sociological effects of transplantation on the patient.
Post-transplant nursing care for the patient begins in the post-anesthesia care unit.
The first 24 hours after transplantation represent a critical period, marked by hemodynamic and
respiratory instability, and there is a great risk of developing complications, mainly of graft
rejection. The nurse treating the patient in the early post-transplant period needs specialized
knowledge to reduce the problems, prevent or anticipate and intervene immediately to maximize
the result of long-term graft and provide quality care throughout the hospitalization period.
The behavior of diuresis is the most important element in the monitoring of renal
functions, since it causes therapeutic behaviors such as hydration, medication and even surgery
for urologic complications.
The urinary catheter placement provides accurate measurement of urine output and determines
the presence of hemorrhage and blood clot, acute graft rejection, and vascular thrombosis, and is
a predictor of the development of transplantation.
The urinary catheter is removed after proper healing of the anastomosis of the ureter into the
bladder, when continued monitoring of urine volume is required. During the hospitalization of
the patient, daily blood tests must be done, with the most relevant results including levels of
serum creatinine, polymerase chain reaction (PCR), white cell count, and levels of
immunosuppressive drugs. These parameters determine that the kidney function is effective and
show the first signs of a possible rejection or infection, and whether the drug levels are within the
therapeutic range required for the maintenance of immunosuppression or induction, maintenance
and treatment of rejection.
The nurse should moniter the patient\'s hemodynamic status and fluid volume to avoid post-
transplant complications while maintaining central venous pressure at 10 mmHg and systolic
blood pressure above 120 mmHg.
Urine output is replaced on an hourly milliliter-for-milliliter basis and should be recorded
hourly.
RNs role in kidney transplant donor in the immediate post-operative period
Donors face the possibility of post-operative complications such as bleeding, wound infection,
fever, etc. Most of the post-operative complications are generally short-term and can be
addressed with quality medical care.
Closely monitor the renal function to assess for impairment and monitor the hematocrit to asses
for bleeding .
Donors experience more pain than recipient. Donor who had an open surgical approach may
experience more pain than when a laproscopic approach used. Donors who had open approach
will be usually discharged from hospital in 4 or 5 day.
Corporate form of business is where an entity is owned by a small .pdf
Corporate form of business is where an entity is owned by a small or large group of people
,called owners /shareholders ,each of whose liability is limited by shares--subject to laws of the
state in which it operates. It has access to finance through issue of shares in the public It is a
separate legal entity ,distinct from its shareholders.So, unlike ,sole-proprietorships&
partnerships, the shareholders are not personally liable,if the business goes into liquidation.
But,the primary disadvantage of this type of business form is double taxation of earnings &
dividends of the company. ie. Any distribution of profits to shareholders ,is only from after-
tax(corporate tax rate) income of the company. But they are also taxed at the personal level,on
receipt of dividends,at the hands of the shareholders.So, the shareholder is subject to double
taxation . So, ANSWER: b) double taxation
Solution
Corporate form of business is where an entity is owned by a small or large group of people
,called owners /shareholders ,each of whose liability is limited by shares--subject to laws of the
state in which it operates. It has access to finance through issue of shares in the public It is a
separate legal entity ,distinct from its shareholders.So, unlike ,sole-proprietorships&
partnerships, the shareholders are not personally liable,if the business goes into liquidation.
But,the primary disadvantage of this type of business form is double taxation of earnings &
dividends of the company. ie. Any distribution of profits to shareholders ,is only from after-
tax(corporate tax rate) income of the company. But they are also taxed at the personal level,on
receipt of dividends,at the hands of the shareholders.So, the shareholder is subject to double
taxation . So, ANSWER: b) double taxation.
Well first thing to remember is that C,N,S, and P.pdf
Well first thing to remember is that C,N,S, and P are more often the central atom
because they are more likely to bond with more atoms than O,F,H, and Cl. If it wants to bond
with more atoms naturally, it will be at the center more often. (If a C always wants 4 atoms
attached to it, it will usually get 4 atoms to attach to it, making it the center). Well choice a. can
be thrown out because its saying that C,N,S, and P cannot hybridize atomic orbitals (which is
already wrong) to allow as many bonds as allowed (meaning that because they can\'t hybridize,
they cant hold as many bonds). This is an argument against why they are not central atoms.
Choice d. can be thrown out too as well because O,F,H, and Cl are less metalic than the others,
yet they do not take as many electrons (because the more electrons an atom shares, the more
bonds it makes). If this was true, O,F,H, and Cl would act more as central atoms. This is also a
negative argument. Left is B and C. C states that more metallic nonmetals have more desire for
electrons, meaning C,N,S, and P want more electrons. This seems true, but then why does B
usually only become BF3, meaning they do not want more electrons. B is true because it says
that O,F,H, and Cl are less likely to share electrons with more than 2 atoms. It doesn\'t say why,
just that it is less likely to. This is true because the sharing electrons with an atom = forming a
bond with an atom. So if they don\'t want to share electrons with more than 2, it means they
don\'t want to naturally form bonds with more than 2 atoms, which is absolutely true. Compared
to C,N,S, and P who are more likely to share electrons with more than 2 atoms and bonding with
more atoms meaning they are more often bonded to several atoms aka being the center.
Solution
Well first thing to remember is that C,N,S, and P are more often the central atom
because they are more likely to bond with more atoms than O,F,H, and Cl. If it wants to bond
with more atoms naturally, it will be at the center more often. (If a C always wants 4 atoms
attached to it, it will usually get 4 atoms to attach to it, making it the center). Well choice a. can
be thrown out because its saying that C,N,S, and P cannot hybridize atomic orbitals (which is
already wrong) to allow as many bonds as allowed (meaning that because they can\'t hybridize,
they cant hold as many bonds). This is an argument against why they are not central atoms.
Choice d. can be thrown out too as well because O,F,H, and Cl are less metalic than the others,
yet they do not take as many electrons (because the more electrons an atom shares, the more
bonds it makes). If this was true, O,F,H, and Cl would act more as central atoms. This is also a
negative argument. Left is B and C. C states that more metallic nonmetals have more desire for
electrons, meaning C,N,S, and P want more electrons. This seems true, but then why does B
usually only become BF3, meaning they do not want more electrons. B is true because it s.
They both have dipole-dipole interactions, interm.pdf
They both have dipole-dipole interactions, intermolecular hydrogen bonding, and
vander wals force. However, water has two lone pairs that can do hydrogen bonding whereas
ammonia has only 1 lone pair.
Solution
They both have dipole-dipole interactions, intermolecular hydrogen bonding, and
vander wals force. However, water has two lone pairs that can do hydrogen bonding whereas
ammonia has only 1 lone pair..
The violin is a string instrument, usually with f.pdf
The violin is a string instrument, usually with four strings tuned in perfect fifths. It
is the smallest, highest-pitched member of the violin family of string instruments, which also
includes the viola and cello. The violin is sometimes informally called a fiddle, regardless of
the type of music played on it. The word violin comes from the Medieval Latin word vitula,
meaning stringed instrument;this word is also believed to be the source of the Germanic
\"fiddle\".The violin, while it has ancient origins, acquired most of its modern characteristics in
16th-century Italy, with some further modifications occurring in the 18th and 19th centuries.
Violinists and collectors particularly prize the instruments made by the Gasparo da Sal
Solution
The violin is a string instrument, usually with four strings tuned in perfect fifths. It
is the smallest, highest-pitched member of the violin family of string instruments, which also
includes the viola and cello. The violin is sometimes informally called a fiddle, regardless of
the type of music played on it. The word violin comes from the Medieval Latin word vitula,
meaning stringed instrument;this word is also believed to be the source of the Germanic
\"fiddle\".The violin, while it has ancient origins, acquired most of its modern characteristics in
16th-century Italy, with some further modifications occurring in the 18th and 19th centuries.
Violinists and collectors particularly prize the instruments made by the Gasparo da Sal.
the element is phosphorus (P) Solution .pdf
Phosphorus is the element being discussed. The document states that the element is phosphorus and repeats that the element is phosphorus.
Step1 False ; An elemental sample consists of one.pdf
An elemental sample consists of only one kind of atom. The statement "An elemental sample consists of one kind of atoms" is false because an elemental sample contains only one type of atom, not multiple kinds of atoms. The solution confirms that the first step is false.
solution or homogeneous mixture Solution .pdf
A solution is a homogeneous mixture that is made up of two or more substances. The substances that make up a solution are evenly distributed throughout and cannot be easily separated. A solution forms a single phase rather than being made up of separate components.
PV ^ n = constant using pv = N R T we get P ^ .pdf
PV ^ n = constant using pv = N* R * T we get P ^ 1-n * T ^ n = contant T1= 150
T1= 293 P2= 600 T2 = 393 k P1/P2 = (T2/T1 ) ^ n/1-n 1/4 = ( 1.34)^ n/1-n taking log on both
side log( 1/4) = n/1-n * ( log (1.34) n/1-n =-4.736 n= 1.267
Solution
PV ^ n = constant using pv = N* R * T we get P ^ 1-n * T ^ n = contant T1= 150
T1= 293 P2= 600 T2 = 393 k P1/P2 = (T2/T1 ) ^ n/1-n 1/4 = ( 1.34)^ n/1-n taking log on both
side log( 1/4) = n/1-n * ( log (1.34) n/1-n =-4.736 n= 1.267.
methyl-m-nitrobenzoate is more polar than methyl .pdf
methyl-m-nitrobenzoate is more polar than methyl benzoate. There is a large
separation of charge in the nitro group (between the nitrogen and oxygens). This leads to a
higher level of polarity, and the compound containing the nitro is more polar. Hope this helps!
Solution
methyl-m-nitrobenzoate is more polar than methyl benzoate. There is a large
separation of charge in the nitro group (between the nitrogen and oxygens). This leads to a
higher level of polarity, and the compound containing the nitro is more polar. Hope this helps!.
L(f(t)) = 6s^4 - 2s^3 .pdf
This document provides the Laplace transform of a function f(t) which is equal to 6/s^4 - 2/s^3. The Laplace transform of the function f(t) is given as L(f(t)) = 6/s^4 - 2/s^3.
here the solution is 0.015 M HCl so we have HCl -.pdf
here the solution is 0.015 M HCl so we have HCl --> H+ + Cl- now, [H+] = 0.0015
M so we have pH = -log[H+] = - log [ 0.0015] = 2.82 and [H3O +]
= [H2O][H+] = 0.0015 * 1.4 x 10-14 = 2.1 x 10-17 M
Solution
here the solution is 0.015 M HCl so we have HCl --> H+ + Cl- now, [H+] = 0.0015
M so we have pH = -log[H+] = - log [ 0.0015] = 2.82 and [H3O +]
= [H2O][H+] = 0.0015 * 1.4 x 10-14 = 2.1 x 10-17 M.
More from navyugenterprisesdoo (20)
Given the evidence available at the time (early 1800s) nothing was.pdf
Given the evidence available at the time (early 1800s) nothing was.pdf
1. Enzymatic digestion of proteins in to amino acids by pepsin.3. .pdf
1. Enzymatic digestion of proteins in to amino acids by pepsin.3. .pdf
1. Assume that those DNA molecules are same in length as well as in .pdf
1. Assume that those DNA molecules are same in length as well as in .pdf
Try to save the file using .vbs extension rather than .wsfType thi.pdf
Try to save the file using .vbs extension rather than .wsfType thi.pdf
There are two types of respirationAerobic respiration takes plac.pdf
There are two types of respirationAerobic respiration takes plac.pdf
The triangle DEF -- TRIANGLE HIG is a glide reflection.Reflection.pdf
The triangle DEF -- TRIANGLE HIG is a glide reflection.Reflection.pdf
The process of making a chip begins with sand. Sand contains 25 sil.pdf
The process of making a chip begins with sand. Sand contains 25 sil.pdf
The Permian Period was the ultimate period of the Paleozoic Era whic.pdf
The Permian Period was the ultimate period of the Paleozoic Era whic.pdf
RNs role in kidney transplant recipient in the immediate post-operat.pdf
RNs role in kidney transplant recipient in the immediate post-operat.pdf
Corporate form of business is where an entity is owned by a small .pdf
Corporate form of business is where an entity is owned by a small .pdf
Well first thing to remember is that C,N,S, and P.pdf
Well first thing to remember is that C,N,S, and P.pdf
They both have dipole-dipole interactions, interm.pdf
They both have dipole-dipole interactions, interm.pdf
The violin is a string instrument, usually with f.pdf
The violin is a string instrument, usually with f.pdf
Step1 False ; An elemental sample consists of one.pdf
Step1 False ; An elemental sample consists of one.pdf
PV ^ n = constant using pv = N R T we get P ^ .pdf
PV ^ n = constant using pv = N R T we get P ^ .pdf
methyl-m-nitrobenzoate is more polar than methyl .pdf
methyl-m-nitrobenzoate is more polar than methyl .pdf
here the solution is 0.015 M HCl so we have HCl -.pdf
here the solution is 0.015 M HCl so we have HCl -.pdf
Recently uploaded
clinical examination of hip joint (1).pdf
described clinical examination all orthopeadic conditions .
Main Java[All of the Base Concepts}.docx
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
Executive Directors Chat Leveraging AI for Diversity, Equity, and Inclusion
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
Types of Herbal Cosmetics its standardization.
Physiology and chemistry of skin and pigmentation, hairs, scalp, lips and nail, Cleansing cream, Lotions, Face powders, Face packs, Lipsticks, Bath products, soaps and baby product,
Preparation and standardization of the following : Tonic, Bleaches, Dentifrices and Mouth washes & Tooth Pastes, Cosmetics for Nails.
How to Fix the Import Error in the Odoo 17
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
A Strategic Approach: GenAI in Education
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama UniversityAkanksha trivedi rama nursing college kanpur.
Natural birth techniques are various type such as/ water birth , alexender method, hypnosis, bradley method, lamaze method etcThe Diamonds of 2023-2024 in the IGRA collection
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptxMohd Adib Abd Muin, Senior Lecturer at Universiti Utara Malaysia
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Hindi varnamala | hindi alphabet PPT.pdf
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
CACJapan - GROUP Presentation 1- Wk 4.pdf
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
The History of Stoke Newington Street Names
Presented at the Stoke Newington Literary Festival on 9th June 2024
www.StokeNewingtonHistory.com
Advanced Java[Extra Concepts, Not Difficult].docx
This is part 2 of my Java Learning Journey. This contains Hashing, ArrayList, LinkedList, Date and Time Classes, Calendar Class and more.
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
How to Manage Your Lost Opportunities in Odoo 17 CRM
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
Recently uploaded (20)
Executive Directors Chat Leveraging AI for Diversity, Equity, and Inclusion
Executive Directors Chat Leveraging AI for Diversity, Equity, and Inclusion
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Digital Artefact 1 - Tiny Home Environmental Design
Digital Artefact 1 - Tiny Home Environmental Design
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
How to Manage Your Lost Opportunities in Odoo 17 CRM
How to Manage Your Lost Opportunities in Odoo 17 CRM
It was a 19th century geologist who first recogni.pdf
- 1. It was a 19th century geologist who first recognized periodicity in the physical properties of the elements. Alexandre Beguyer de Chancourtois (1820-1886), professor of geology at the School of Mines in Paris, published in 1862 a list of all the known elements. The list was constructed as a helical graph wrapped around a cylinder--elements with similar properties occupied positions on the same vertical line of cylinder (the list also included some ions and compounds). Using geological terms and published without the diagram, de Chancourtois ideas were completely ignored until the work of Mendeleev. it is used to distinguish elements by their properties Solution It was a 19th century geologist who first recognized periodicity in the physical properties of the elements. Alexandre Beguyer de Chancourtois (1820-1886), professor of geology at the School of Mines in Paris, published in 1862 a list of all the known elements. The list was constructed as a helical graph wrapped around a cylinder--elements with similar properties occupied positions on the same vertical line of cylinder (the list also included some ions and compounds). Using geological terms and published without the diagram, de Chancourtois ideas were completely ignored until the work of Mendeleev. it is used to distinguish elements by their properties