This document contains notes on isotopes and the periodic table. It defines key terms like atomic number, mass number, isotope, and period and group. It provides examples of isotopes like iodine-131 and discusses how isotopes of an element have the same atomic number but different mass numbers. The document also explains that the periodic table arranges elements into periods and groups based on repeating properties and how this organization illustrates similarities within periods and groups.
The existence of isotopes was first suggested in 1913 by the radiochemist Frederick Soddy,
based on studies of radioactive decay chains that indicated about 40 different species referred
to as radioelements (i.e. radioactive elements) between uranium and lead, although the periodic
table only allowed for 11 elements.
*In nature, most of the elements have many atoms that have the same atomic number but
different mass numbers such atoms of an element are called isotopes. This concept will be more clear from this ppt. And also radioactive isotopes applications and calculation of average atomic mass are explained. Hope it helps! And this is mainly for class ix
Warning:Too much etym.
Also, a considerable amount of questions have been copied from numerous small quizzes on slideshare. Not verbatim but yes, I've taken ideas from them. Sincere apologies.
Also, this was meant for a first time audience so I've made it quite simple. Keywords in bold and all..
The existence of isotopes was first suggested in 1913 by the radiochemist Frederick Soddy,
based on studies of radioactive decay chains that indicated about 40 different species referred
to as radioelements (i.e. radioactive elements) between uranium and lead, although the periodic
table only allowed for 11 elements.
*In nature, most of the elements have many atoms that have the same atomic number but
different mass numbers such atoms of an element are called isotopes. This concept will be more clear from this ppt. And also radioactive isotopes applications and calculation of average atomic mass are explained. Hope it helps! And this is mainly for class ix
Warning:Too much etym.
Also, a considerable amount of questions have been copied from numerous small quizzes on slideshare. Not verbatim but yes, I've taken ideas from them. Sincere apologies.
Also, this was meant for a first time audience so I've made it quite simple. Keywords in bold and all..
This PowerPoint is one small part of the Atoms and Periodic Table of the Elements unit from www.sciencepowerpoint.com. This unit consists of a five part 2000+ slide PowerPoint roadmap, 12 page bundled homework package, modified homework, detailed answer keys, 15 pages of unit notes for students who may require assistance, follow along worksheets, and many review games. The homework and lesson notes chronologically follow the PowerPoint slideshow. The answer keys and unit notes are great for support professionals. The activities and discussion questions in the slideshow are meaningful. The PowerPoint includes built-in instructions, visuals, and review questions. Also included are critical class notes (color coded red), project ideas, video links, and review games. This unit also includes four PowerPoint review games (110+ slides each with Answers), 38+ video links, lab handouts, activity sheets, rubrics, materials list, templates, guides, and much more. Also included is a 190 slide first day of school PowerPoint presentation.
Areas of Focus: -Atoms (Atomic Force Microscopes), Rutherford's Gold Foil Experiment, Cathode Tube, Atoms, Fundamental Particles, The Nucleus, Isotopes, AMU, Size of Atoms and Particles, Quarks, Recipe of the Universe, Atomic Theory, Atomic Symbols, #'s, Valence Electrons, Octet Rule, SPONCH Atoms, Molecules, Hydrocarbons (Structure), Alcohols (Structure), Proteins (Structure), Periodic Table of the Elements, Organization of Periodic Table, Transition Metals, Electron Negativity, Non-Metals, Metals, Metalloids, Atomic Bonds, Ionic Bonds, Covalent Bonds, Metallic Bonds, Ionization, and much more.
This unit aligns with the Next Generation Science Standards and with Common Core Standards for ELA and Literacy for Science and Technical Subjects. See preview for more information
If you have any questions please feel free to contact me. Thanks again and best wishes. Sincerely, Ryan Murphy M.Ed www.sciencepowerpoint@gmail.com
Teaching Duration = 4+ Weeks
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The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
6. ISOTOPES-Atoms with the same
number of protons, but different
numbers of neutrons
They are still the same element, but they
have different weights because they
have different numbers of neutrons.
7. The number of protons plus
neutrons in an atom is called the
mass number.
8. The number of protons plus
neutrons in an atom is called the
mass number.
Isotopes are identified by their
mass numbers.
Mass number
Iodine-131 or
131
53 I
atomic
number
9. Isotopes of an element will have the same
_____________ but different ____________.
10. Isotopes of an element will have the same
_____________ but different ____________.
atomic number
11. Isotopes of an element will have the same
_____________ but different ____________.
atomic number mass numbers
31. The periodic table arranges
elements into groups based on
a set of repeating properties.
32. •Each horizontal row of the
periodic table is called a period.
• Within a given period, the properties of the
elements vary as you move across it from
element to element.
• At the end of a sentence, written horizontally, is a period.
37. •Each vertical column of the
periodic table is called a
group, or family.
•Elements within a group have
similar chemical and physical
properties.
38. 4.3 The Periodic Table—A Preview
A Group or Family
39. 4.3 The Periodic Table—A Preview
A Group or Family
40. 4.3 Section Quiz
1. Isotopes of an element have
a. the same mass number.
b. different atomic numbers.
c. the same number of protons but different
numbers of neutrons.
d. the same number of protons but different
numbers of electrons.
41. 4.3 Section Quiz
1. Isotopes of an element have
a. the same mass number.
b. different atomic numbers.
c. the same number of protons but different
numbers of neutrons.
d. the same number of protons but different
numbers of electrons.
42. 4.3 Section Quiz
2. How many neutrons are in sulfur-33?
a. 16 neutrons
b. 33 neutrons
c. 17 neutrons
d. 32.06 neutrons
43. 4.3 Section Quiz
2. How many neutrons are in sulfur-33?
a. 16 neutrons
b. 33 neutrons
c. 17 neutrons
d. 32.06 neutrons
Editor's Notes
Neon-20, neon-21, and neon-22 are three isotopes of neon, a gaseous element used in lighted signs. Comparing and Contrasting How are these isotopes different? How are they similar?
Au is the chemical symbol for gold. Applying Concepts How many electrons does a gold atom have?
