The document provides information about the periodic table of elements. It discusses the historical development of the periodic table from Dobereiner's triads to Mendeleev and Meyer independently developing the first periodic tables. It then explains key features of the modern periodic table including periods and groups, representative elements, metals and nonmetals, and trends in properties like reactivity, metallic character, and atomic radius across periods and down groups. Several activities are provided to help students understand these concepts and trends through sorting and classifying elements.
1. The document discusses the development and importance of the periodic table of elements. It traces the periodic table back to Dobereiner's triads in 1817 and covers contributions by scientists like Newlands, Meyer, Mendeleev and Moseley that led to the modern periodic table.
2. The periodic table organizes elements into vertical columns called groups with similar properties and horizontal rows called periods. Elements are classified based on their atomic structure and properties like reactivity and atomic radius that vary periodically with atomic number.
3. The periodic table is useful for predicting chemical behaviors and properties of elements based on their location in the table. It provides an organized framework for understanding the relationships between elements and how their properties change
1. The document discusses the development and importance of the periodic table of elements. It traces the periodic table back to Dobereiner's triads in 1817 and covers contributions by scientists like Newlands, Meyer, Mendeleev and Moseley that led to the modern periodic table.
2. The periodic table organizes elements by atomic number and groups elements with similar properties together. It shows trends like atomic radius decreasing across periods and increasing down groups. The position of an element in the table can reveal information about its chemical properties and reactivity.
3. The document emphasizes that the periodic table is an essential tool for understanding and predicting the behavior of elements and their compounds. It provides a systematic organization of all
This document provides information about atoms in the periodic table. It begins with background on the development of the periodic table by scientists like Döbereiner, Newlands, and Mendeleev. Mendeleev organized the elements in a table based on atomic mass, leaving spaces for undiscovered elements. The periodic table arranges elements in rows (periods) and columns (groups) according to atomic structure. Elements in the same group have the same number of outer shell electrons and similar properties. The document defines key terms and explains how elements are named, grouped as metals/nonmetals/metalloids, and classified into groups based on their location in the periodic table.
The document provides guidance for teaching students about trends in the periodic table. It outlines objectives for students to understand periodic trends, chemical bonding types, and the historical development of the periodic table. Activities are described where students will construct their own periodic table and analyze trends within periods and groups. Tables should be created showing how properties vary within periods and groups.
PERIODIC TABLE OF ELEMENTS and QUANTUM MECHANICS lesson proper NO RECORDED AU...wed_adams
The document provides an overview of a lesson plan on the periodic table of elements and quantum mechanics. The lesson objectives are to familiarize students with the periodic table, atomic structure, and quantum numbers. The lesson includes reviewing matter and its phases, an activity where students work in groups to fill in and present their periodic tables, and explanations of the history and components of the periodic table including atomic particles, electron configuration, and periodic trends.
Ch 5.1,5.2 organizing elements & the periodic tableArt Pagar
The document summarizes key aspects of the periodic table, including how Mendeleev organized the elements and used the periodic table to predict undiscovered elements. It describes the modern periodic table as arranging elements by atomic number in rows called periods and columns called groups, with elements in the same group having similar properties due to their electron configurations. The document also discusses atomic structure including atomic number and mass, and classifies elements as metals, nonmetals, and metalloids based on their physical and chemical properties.
The document discusses the development and organization of the periodic table. It describes how scientists like Newlands, Meyer, and Mendeleev contributed to organizing the elements. Key features of the modern periodic table are that elements are arranged by atomic number in periods and groups. Elements have characteristic properties based on their position and electron configuration.
The periodic table evolved over time as scientists discovered more useful ways to organize the elements. Elements are organized into blocks according to their electron configurations, with trends in properties like atomic radius occurring from period to period and group to group. Atomic radius generally decreases left to right as nuclear charge increases, and increases down a group as the outer orbital size increases. Ionic radius follows similar trends but is smaller for positive ions and larger for negative ions due to electron gain or loss.
1. The document discusses the development and importance of the periodic table of elements. It traces the periodic table back to Dobereiner's triads in 1817 and covers contributions by scientists like Newlands, Meyer, Mendeleev and Moseley that led to the modern periodic table.
2. The periodic table organizes elements into vertical columns called groups with similar properties and horizontal rows called periods. Elements are classified based on their atomic structure and properties like reactivity and atomic radius that vary periodically with atomic number.
3. The periodic table is useful for predicting chemical behaviors and properties of elements based on their location in the table. It provides an organized framework for understanding the relationships between elements and how their properties change
1. The document discusses the development and importance of the periodic table of elements. It traces the periodic table back to Dobereiner's triads in 1817 and covers contributions by scientists like Newlands, Meyer, Mendeleev and Moseley that led to the modern periodic table.
2. The periodic table organizes elements by atomic number and groups elements with similar properties together. It shows trends like atomic radius decreasing across periods and increasing down groups. The position of an element in the table can reveal information about its chemical properties and reactivity.
3. The document emphasizes that the periodic table is an essential tool for understanding and predicting the behavior of elements and their compounds. It provides a systematic organization of all
This document provides information about atoms in the periodic table. It begins with background on the development of the periodic table by scientists like Döbereiner, Newlands, and Mendeleev. Mendeleev organized the elements in a table based on atomic mass, leaving spaces for undiscovered elements. The periodic table arranges elements in rows (periods) and columns (groups) according to atomic structure. Elements in the same group have the same number of outer shell electrons and similar properties. The document defines key terms and explains how elements are named, grouped as metals/nonmetals/metalloids, and classified into groups based on their location in the periodic table.
The document provides guidance for teaching students about trends in the periodic table. It outlines objectives for students to understand periodic trends, chemical bonding types, and the historical development of the periodic table. Activities are described where students will construct their own periodic table and analyze trends within periods and groups. Tables should be created showing how properties vary within periods and groups.
PERIODIC TABLE OF ELEMENTS and QUANTUM MECHANICS lesson proper NO RECORDED AU...wed_adams
The document provides an overview of a lesson plan on the periodic table of elements and quantum mechanics. The lesson objectives are to familiarize students with the periodic table, atomic structure, and quantum numbers. The lesson includes reviewing matter and its phases, an activity where students work in groups to fill in and present their periodic tables, and explanations of the history and components of the periodic table including atomic particles, electron configuration, and periodic trends.
Ch 5.1,5.2 organizing elements & the periodic tableArt Pagar
The document summarizes key aspects of the periodic table, including how Mendeleev organized the elements and used the periodic table to predict undiscovered elements. It describes the modern periodic table as arranging elements by atomic number in rows called periods and columns called groups, with elements in the same group having similar properties due to their electron configurations. The document also discusses atomic structure including atomic number and mass, and classifies elements as metals, nonmetals, and metalloids based on their physical and chemical properties.
The document discusses the development and organization of the periodic table. It describes how scientists like Newlands, Meyer, and Mendeleev contributed to organizing the elements. Key features of the modern periodic table are that elements are arranged by atomic number in periods and groups. Elements have characteristic properties based on their position and electron configuration.
The periodic table evolved over time as scientists discovered more useful ways to organize the elements. Elements are organized into blocks according to their electron configurations, with trends in properties like atomic radius occurring from period to period and group to group. Atomic radius generally decreases left to right as nuclear charge increases, and increases down a group as the outer orbital size increases. Ionic radius follows similar trends but is smaller for positive ions and larger for negative ions due to electron gain or loss.
The periodic table presentation for 4050 [autosaved]Michelle Fuentes
The document provides information about the periodic table including:
- The periodic table organizes elements according to their atomic number and valence electrons.
- Elements in the same column have similar chemical properties.
- The periodic table has been developed and improved over time by scientists like Dmitri Mendeleev and Lothar Meyer to better organize the known elements.
- The periodic table is an essential tool for chemists as it provides key information about elements like their atomic number, mass, configuration, and reactivity.
The document summarizes the development and key features of the periodic table. It traces how early scientists like Newlands and Mendeleev organized the elements and developed periodic trends. The modern periodic table is arranged by atomic number and contains metals, nonmetals, and metalloids organized into blocks and groups. Elements in the same group have similar properties due to their electron configurations, and properties vary periodically according to trends like atomic radius and ionization energy.
Physical Science 5.1 : Arranging the ElementsChris Foltz
Dmitri Mendeleev arranged the elements in order of increasing atomic mass in 1869 and discovered repeating patterns in their properties. This became known as the periodic table. Mendeleev predicted properties of elements not yet discovered that would fill gaps in the table. Later, Henry Moseley arranged elements by atomic number in 1914, which better fit the periodic patterns. The periodic table classifies elements as metals, nonmetals, and metalloids based on their location and number of outer electrons. Periods are horizontal rows that show repeating patterns, and groups are vertical columns of elements with similar properties.
The document contains multiple choice, true/false, and completion questions about the periodic table and properties of elements. It covers topics like Mendeleev's creation of the periodic table based on atomic mass, use of atomic number to organize the table, predicting properties from an element's location, groups having similar properties, atomic structure, states of matter, and nuclear fusion in stars.
The document discusses the development and key features of the periodic table. It describes how early scientists like Newlands, Meyer, and Mendeleev organized the elements based on properties like atomic mass and predicted new elements. Moseley later showed atomic number was fundamental. The modern periodic table is organized into rows (periods) and columns (groups) based on electron configuration. Elements in the same group have similar properties due to their valence electrons. The document outlines trends in properties like atomic radius, ionization energy, and electronegativity across periods and down groups.
The document summarizes key aspects of the periodic table, including:
1) Mendeleev arranged elements on cards based on properties and discovered a repeating pattern when ordered by atomic mass, leading to the creation of the periodic table.
2) The periodic table shows elements arranged in order of atomic number and classified as metals, nonmetals, and metalloids, with metals having properties like conductivity.
3) The modern periodic table has rows called periods and columns called groups that show repeating trends in properties across and down the table.
This document provides an overview of how elements are organized in the periodic table. It discusses early classification systems developed by Newlands and Mendeleev and how Moseley later determined that atomic number, not atomic mass, is the basis for organization. Key periodic properties like valence electrons and how they determine chemical properties are explained. Finally, it gives a brief tour of different groups of elements and trends seen in the periodic table.
Introduction to Periodic Table (Science)JhoanaMercene
This document provides an introduction to the periodic table including its history and key concepts. It discusses the early scientists who contributed to the development of the periodic table like Dmitri Mendeleev, Johann Döbereiner, Lothar Meyer, and John Newlands. It then defines important periodic table terms including atomic number, symbol, atomic weight, and explains how to use the periodic table to find proton, electron and neutron numbers. It also distinguishes between elements, compounds and mixtures. Finally, it discusses periodic table groups and periods as well as Bohr's atomic model and the quantum mechanical model of the atom.
The document provides instructions for viewing a presentation as a slideshow and navigating between slides. It also provides an overview of the contents and organization of the presentation, which is about the periodic table and includes sections on arranging elements and grouping elements according to their properties.
Ununhexium is element 116 on the periodic table, which was officially named livermorium by the IUPAC in 2012 after its discovery by a joint team from the Joint Institute for Nuclear Research and the Lawrence Livermore National Laboratory through the fusion of lighter elements. Two other newly discovered elements, ununtrium (element 113) and ununpentium (element 115), have yet to be officially confirmed and named. The document discusses the discovery and naming of the latest heavy elements added to the periodic table.
The Periodic Table organizes elements based on their atomic structure and properties. It arranges over 100 elements in a repeating pattern based on their atomic number and mass. Elements are organized into rows called periods and columns called groups, with metals on the left, nonmetals on the right, and metalloids in between. The location of an element on the Periodic Table can predict its properties and reactivity.
1. Early chemists attempted to classify elements based on similarities in their properties, including Dobereiner who grouped elements into triads and Newlands who arranged them in octaves based on increasing atomic mass. However, these classifications had limitations as they could not accommodate all known elements.
2. Mendeleev organized the periodic table with elements arranged in order of increasing atomic mass and proposed that elements with similar properties would fall into the same groups. His periodic table allowed for predictions of unknown elements and became widely accepted.
3. Modern periodic tables are based on atomic number rather than mass and include additional periodic trends like atomic size, metallic character, and valency that help explain elements' properties. The current 18-
1. Early chemists like Dobereiner and Newlands attempted to classify elements based on their properties, but their systems had limitations as they could not accommodate all known elements.
2. Mendeleev organized the known elements into the first periodic table based on their atomic masses and properties, allowing elements with similar properties to be grouped together. He also predicted new elements, and his table became the basis for modern classifications.
3. The modern periodic table is arranged by atomic number rather than atomic mass. Elements in the same group have the same number of valence electrons and similar properties, while periods correspond to the filling of electron shells as atomic number increases from left to right.
The document summarizes key concepts from Chapter 4 of the textbook, including:
1) Elements are organized in the periodic table based on their atomic number, with elements in the same group sharing similar chemical properties due to having the same number of valence electrons.
2) Early scientists like Newlands and Mendeleev noticed repeating patterns in element properties and developed the first periodic tables, with Mendeleev arranging elements by atomic mass and predicting missing elements.
3) Moseley later determined that atomic number, not atomic mass, is the fundamental basis for the periodic table's organization.
4) The periodic table is divided into blocks like s-block main group elements and d-block transition metals that have
The document summarizes the development of the periodic table of elements from early classifications by Dobereiner and Newlands to Mendeleev's and Meyer's published periodic tables to Moseley's establishment of the ordering by atomic number. It explains key periodic properties including atomic structure and trends in atomic size, and provides an overview of the layout and information contained in the modern periodic table.
This document provides information on the periodic classification of elements. It discusses the early attempts at classifying elements, including Dobereiner's triads, Newlands' law of octaves, and Mendeleev's periodic table. It describes the key features and merits of Mendeleev's periodic table, including its ability to predict new elements. The document also outlines some defects in Mendeleev's table and discusses how the modern periodic table is based on atomic number rather than atomic mass according to the modern periodic law.
This document summarizes key concepts from Chapter 5 on the periodic classification of elements:
1. Early scientists like Dobereiner and Newlands attempted to classify elements based on their properties but their systems did not comprehensively explain the trends.
2. Mendeleev organized the known elements into the first periodic table based on their atomic masses and properties, noting periodic trends. This helped predict new elements.
3. Modern periodic tables are organized by atomic number not mass, reflecting Moseley's discovery of each element's unique atomic number. Periodic trends exist in properties like size, valence, and metallicity across periods and groups.
1. Dmitri Mendeleev created one of the first periodic tables by arranging the elements in order of increasing atomic mass. He noticed that elements seemed to repeat properties every eighth element.
2. Mendeleev arranged the elements into groups with similar properties and left gaps for elements that had not yet been discovered. The periodic table was later reorganized by atomic number.
3. The periodic table is arranged into rows called periods and columns called groups. Each element square provides the symbol, name, atomic number and other properties. Valence electrons are important for determining chemical properties and are indicated by the group number.
This document provides an overview of the periodic table and periodic trends. It discusses how the periodic table is arranged and organized into periods and groups. Elements within the same group have similar properties because they have the same number of valence electrons. The location of an element on the periodic table can be used to predict its properties. The document also describes different types of elements, including metals, nonmetals, metalloids, and noble gases, and explains the trends in atomic structure that led to the development of the periodic table.
Islam is a monotheistic religion founded in the 7th century CE. It has over 1.5 billion adherents worldwide. The two primary sacred texts of Islam are the Quran and the Hadith. The five pillars of Islam are the Shahadah, Salat, Zakat, Sawm, and Hajj. Major denominations include the Sunnis and Shiites. Core beliefs include the oneness of God and that Muhammad is his final prophet. Practices involve daily prayers, fasting during Ramadan, giving alms to the poor, and pilgrimage to Mecca. Issues related to women's roles and terrorism have been debated within Islamic communities.
The periodic table presentation for 4050 [autosaved]Michelle Fuentes
The document provides information about the periodic table including:
- The periodic table organizes elements according to their atomic number and valence electrons.
- Elements in the same column have similar chemical properties.
- The periodic table has been developed and improved over time by scientists like Dmitri Mendeleev and Lothar Meyer to better organize the known elements.
- The periodic table is an essential tool for chemists as it provides key information about elements like their atomic number, mass, configuration, and reactivity.
The document summarizes the development and key features of the periodic table. It traces how early scientists like Newlands and Mendeleev organized the elements and developed periodic trends. The modern periodic table is arranged by atomic number and contains metals, nonmetals, and metalloids organized into blocks and groups. Elements in the same group have similar properties due to their electron configurations, and properties vary periodically according to trends like atomic radius and ionization energy.
Physical Science 5.1 : Arranging the ElementsChris Foltz
Dmitri Mendeleev arranged the elements in order of increasing atomic mass in 1869 and discovered repeating patterns in their properties. This became known as the periodic table. Mendeleev predicted properties of elements not yet discovered that would fill gaps in the table. Later, Henry Moseley arranged elements by atomic number in 1914, which better fit the periodic patterns. The periodic table classifies elements as metals, nonmetals, and metalloids based on their location and number of outer electrons. Periods are horizontal rows that show repeating patterns, and groups are vertical columns of elements with similar properties.
The document contains multiple choice, true/false, and completion questions about the periodic table and properties of elements. It covers topics like Mendeleev's creation of the periodic table based on atomic mass, use of atomic number to organize the table, predicting properties from an element's location, groups having similar properties, atomic structure, states of matter, and nuclear fusion in stars.
The document discusses the development and key features of the periodic table. It describes how early scientists like Newlands, Meyer, and Mendeleev organized the elements based on properties like atomic mass and predicted new elements. Moseley later showed atomic number was fundamental. The modern periodic table is organized into rows (periods) and columns (groups) based on electron configuration. Elements in the same group have similar properties due to their valence electrons. The document outlines trends in properties like atomic radius, ionization energy, and electronegativity across periods and down groups.
The document summarizes key aspects of the periodic table, including:
1) Mendeleev arranged elements on cards based on properties and discovered a repeating pattern when ordered by atomic mass, leading to the creation of the periodic table.
2) The periodic table shows elements arranged in order of atomic number and classified as metals, nonmetals, and metalloids, with metals having properties like conductivity.
3) The modern periodic table has rows called periods and columns called groups that show repeating trends in properties across and down the table.
This document provides an overview of how elements are organized in the periodic table. It discusses early classification systems developed by Newlands and Mendeleev and how Moseley later determined that atomic number, not atomic mass, is the basis for organization. Key periodic properties like valence electrons and how they determine chemical properties are explained. Finally, it gives a brief tour of different groups of elements and trends seen in the periodic table.
Introduction to Periodic Table (Science)JhoanaMercene
This document provides an introduction to the periodic table including its history and key concepts. It discusses the early scientists who contributed to the development of the periodic table like Dmitri Mendeleev, Johann Döbereiner, Lothar Meyer, and John Newlands. It then defines important periodic table terms including atomic number, symbol, atomic weight, and explains how to use the periodic table to find proton, electron and neutron numbers. It also distinguishes between elements, compounds and mixtures. Finally, it discusses periodic table groups and periods as well as Bohr's atomic model and the quantum mechanical model of the atom.
The document provides instructions for viewing a presentation as a slideshow and navigating between slides. It also provides an overview of the contents and organization of the presentation, which is about the periodic table and includes sections on arranging elements and grouping elements according to their properties.
Ununhexium is element 116 on the periodic table, which was officially named livermorium by the IUPAC in 2012 after its discovery by a joint team from the Joint Institute for Nuclear Research and the Lawrence Livermore National Laboratory through the fusion of lighter elements. Two other newly discovered elements, ununtrium (element 113) and ununpentium (element 115), have yet to be officially confirmed and named. The document discusses the discovery and naming of the latest heavy elements added to the periodic table.
The Periodic Table organizes elements based on their atomic structure and properties. It arranges over 100 elements in a repeating pattern based on their atomic number and mass. Elements are organized into rows called periods and columns called groups, with metals on the left, nonmetals on the right, and metalloids in between. The location of an element on the Periodic Table can predict its properties and reactivity.
1. Early chemists attempted to classify elements based on similarities in their properties, including Dobereiner who grouped elements into triads and Newlands who arranged them in octaves based on increasing atomic mass. However, these classifications had limitations as they could not accommodate all known elements.
2. Mendeleev organized the periodic table with elements arranged in order of increasing atomic mass and proposed that elements with similar properties would fall into the same groups. His periodic table allowed for predictions of unknown elements and became widely accepted.
3. Modern periodic tables are based on atomic number rather than mass and include additional periodic trends like atomic size, metallic character, and valency that help explain elements' properties. The current 18-
1. Early chemists like Dobereiner and Newlands attempted to classify elements based on their properties, but their systems had limitations as they could not accommodate all known elements.
2. Mendeleev organized the known elements into the first periodic table based on their atomic masses and properties, allowing elements with similar properties to be grouped together. He also predicted new elements, and his table became the basis for modern classifications.
3. The modern periodic table is arranged by atomic number rather than atomic mass. Elements in the same group have the same number of valence electrons and similar properties, while periods correspond to the filling of electron shells as atomic number increases from left to right.
The document summarizes key concepts from Chapter 4 of the textbook, including:
1) Elements are organized in the periodic table based on their atomic number, with elements in the same group sharing similar chemical properties due to having the same number of valence electrons.
2) Early scientists like Newlands and Mendeleev noticed repeating patterns in element properties and developed the first periodic tables, with Mendeleev arranging elements by atomic mass and predicting missing elements.
3) Moseley later determined that atomic number, not atomic mass, is the fundamental basis for the periodic table's organization.
4) The periodic table is divided into blocks like s-block main group elements and d-block transition metals that have
The document summarizes the development of the periodic table of elements from early classifications by Dobereiner and Newlands to Mendeleev's and Meyer's published periodic tables to Moseley's establishment of the ordering by atomic number. It explains key periodic properties including atomic structure and trends in atomic size, and provides an overview of the layout and information contained in the modern periodic table.
This document provides information on the periodic classification of elements. It discusses the early attempts at classifying elements, including Dobereiner's triads, Newlands' law of octaves, and Mendeleev's periodic table. It describes the key features and merits of Mendeleev's periodic table, including its ability to predict new elements. The document also outlines some defects in Mendeleev's table and discusses how the modern periodic table is based on atomic number rather than atomic mass according to the modern periodic law.
This document summarizes key concepts from Chapter 5 on the periodic classification of elements:
1. Early scientists like Dobereiner and Newlands attempted to classify elements based on their properties but their systems did not comprehensively explain the trends.
2. Mendeleev organized the known elements into the first periodic table based on their atomic masses and properties, noting periodic trends. This helped predict new elements.
3. Modern periodic tables are organized by atomic number not mass, reflecting Moseley's discovery of each element's unique atomic number. Periodic trends exist in properties like size, valence, and metallicity across periods and groups.
1. Dmitri Mendeleev created one of the first periodic tables by arranging the elements in order of increasing atomic mass. He noticed that elements seemed to repeat properties every eighth element.
2. Mendeleev arranged the elements into groups with similar properties and left gaps for elements that had not yet been discovered. The periodic table was later reorganized by atomic number.
3. The periodic table is arranged into rows called periods and columns called groups. Each element square provides the symbol, name, atomic number and other properties. Valence electrons are important for determining chemical properties and are indicated by the group number.
This document provides an overview of the periodic table and periodic trends. It discusses how the periodic table is arranged and organized into periods and groups. Elements within the same group have similar properties because they have the same number of valence electrons. The location of an element on the periodic table can be used to predict its properties. The document also describes different types of elements, including metals, nonmetals, metalloids, and noble gases, and explains the trends in atomic structure that led to the development of the periodic table.
Islam is a monotheistic religion founded in the 7th century CE. It has over 1.5 billion adherents worldwide. The two primary sacred texts of Islam are the Quran and the Hadith. The five pillars of Islam are the Shahadah, Salat, Zakat, Sawm, and Hajj. Major denominations include the Sunnis and Shiites. Core beliefs include the oneness of God and that Muhammad is his final prophet. Practices involve daily prayers, fasting during Ramadan, giving alms to the poor, and pilgrimage to Mecca. Issues related to women's roles and terrorism have been debated within Islamic communities.
This document contains a daily lesson log for an 8th grade science class covering balanced and unbalanced forces. The lesson objectives are to investigate the relationship between force and motion, identify forces acting on objects, and explain why objects stay at rest or in motion. The content presented includes examples and activities to demonstrate balanced and unbalanced forces. Formative assessments with multiple choice questions are used to evaluate student learning. The teacher reflects on teaching strategies and student performance.
This document lists and describes 14 common computer components, including input devices like the keyboard and mouse, storage devices like the hard drive and RAM, the central processing unit (CPU) that runs programs, the motherboard that connects components, and output devices like the monitor, speaker and printer. The components work together to allow users to input, process, store and output digital data on a computer system.
The digestive system breaks down complex foods into simpler molecules that can be absorbed and used by the body. Digestion involves both mechanical and chemical breakdown of food. The digestive tract includes the mouth, esophagus, stomach, small intestine, and large intestine. Accessory organs like the liver, gallbladder and pancreas also play important roles in digestion by producing enzymes and bile that help break down food.
The documents provide information and worksheets on trends in the periodic table and chemical properties. The objectives are for students to 1) identify compounds and elements in product labels, 2) create a periodic table based on criteria and explain arrangements, and 3) determine atomic structure including protons, neutrons and electrons. The trends discussed include atomic size decreasing across periods but increasing down groups, and reactivity generally increasing as you move from left to right across a period and from top to bottom down a group.
This certificate of participation was awarded to an individual for participating in the virtual National Teachers' Day celebration held on October 5, 2021 and hosted by the Department of Education Regional Office VII in Cebu City, Philippines. The certificate was issued electronically on October 5, 2021 and signed by Undersecretary Tonisito M.C. Umali of the Department of Education.
The document describes the key processes and organs involved in human digestion. It discusses how food is broken down mechanically and chemically by the mouth, stomach, and intestines. Various glands secrete enzymes and juices to aid in digestion. The end products are absorbed for use by the body, while waste is eliminated.
Chapter wise All Notes of First year Basic Civil Engineering.pptxDenish Jangid
Chapter wise All Notes of First year Basic Civil Engineering
Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
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.
How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
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
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
1. 1
SCIENCE 8
Third Quarter
Week 7 and 8
Periodic Table of Elements
MELC: Use the periodic table to predict the chemical behavior of an element.
Objectives:
• trace the development of the periodic table;
• identify the different basis of arranging the elements in the periodic table
• identify parts of the periodic table
• explain trends in reactivity, metallic and atomic radius
• arrange elements based on the reactivity, metallic and atomic radius trend
Let’s Try
Multiple Choices. Identify the choice that best completes the statement or answers the question.
Write your answer on a separate sheet of paper.
1. Which law or basis did Johann Wolfgang Dobereiner used in his arrangement of Periodic Table?
A. Triads
B. Periodic Law
C. Law of Octaves
D. None of the above
2. According to periodic law the properties of element vary periodically with what number?
A. Atomic number
B. Number of nuclei
C. Number of neutrons
D. Atomic mass number
3. Which of the following does NOT belong to group IIA?
A. Ba B. Mg C. Na D. Sr
4. Which of the following groups of elements have stable configuration?
A. Alkali metals
B. Alkaline earth metals
C. Halogens
D. Noble gases
2. 2
5. Which of the following elements is NOT included in the actinide series?
A. Am B. Cm C. Er D. Np
6. In what period of elements does silver belong?
A. 4 B. 5 C. 6 D. 7
7. Which of the following is a lanthanide?
A. Es B. Eu C. Pu D. Pr
8. Which of the following is the most metallic element?
A. Al B. Ga C. Ge D. Si
9. Which element belongs to group 15 and in the sixth period?
A. At B. Bi C. Po D. Sb
10. All of the following elements are metals EXCEPT?
A. Br B. Co C. Cu D. Zn
3. 3
Let’s Explore and Discover
Elements are essential on our daily survival. We use some of them as food, medicine,
hygiene and many more. Some are naturally found in our environment and some are synthetically
made from the laboratory. But, all of them are found and presented in the periodic table of
elements.
This periodic table was developed as a result of years of painstaking work by different
scientists. Its present form was a result of meticulous and thorough study by scientists. The
information and data of every element was arranged and organized in ways that will make it more
understandable, meaningful, and useful.
Historical Development of Periodic Table
The development of the Periodic table could be traced back in 1817 to the work of Johann
Dobereiner, a German chemist who formed the triads of elements with similar properties like the
triad of calcium, barium and strontium. In 1863, John Newlands, an English chemist proposed
the Law of Octaves. He based his classification of elements on the fact that similar properties could
be noted for every eight elements when they are arranged in order of increasing atomic masses.
Around 1869 two scientists determined a way to put the elements in order. Lothar Meyer and
Dmitri Mendeleev both came up with periodic tables that showed how elements should be grouped.
It is interesting to note that these two scientists did not personally know each other, yet they came
up with the same conclusions. Both scientists were teachers living and working in different places.
Meyer lived and worked in Germany while Mendeleev in Russia. Both arranged the elements in
order of increasing atomic mass while putting in groups those with similar properties. Both of
them also left blank spaces in their tables, believing that these spaces would be filled later with
elements yet to be discovered.
Later, in 1914, Henry Moseley, an English physicist observed that the order of the X-ray
frequencies emitted by elements follows the ordering of the elements by atomic number. This
observation led to the development of the modern periodic law which “states that the properties of
elements vary periodically with atomic number”.
The modern periodic table
The modern periodic table organizes elements in
such a way that information about the elements
and their compounds are easily revealed.
• The vertical columns of the periodic table,
called groups, identify the principal
families of elements.
• Some families have their special names.
Refer to the figure on the right,
✓ Group 1 is named as the alkali
metals,
✓ Group 2 as the alkaline earth
metals,
✓ Group 17 as the halogens and
Source: Illustrated in the Grade 8 – Science Learning
Module published on 2013.
4. 4
✓ Group 18 as the noble gases.
✓ Groups 13 to 16 are named based on the first element found in their families.
• The horizontal rows are called periods are numbered from the top to bottom. There are 7
horizontal rows or periods in the periodic table.
• Group 3 to Group 12 constitutes one block wherein elements in this block are referred as the
transition elements.
• The lanthanides and actinides are special series of elements but are also part of the
transition block; they are also called the inner transition elements.
• Elements from the taller columns (groups 1, 2, and 13, through 18) are called the
representative elements or main groups of the periodic table.
• A stair step line separates metals and
nonmetals. Elements along the stair step line are
the semimetals.
• The seven elements commonly regarded as
semimetals are boron, silicon, germanium,
arsenic, antimony, tellurium, and polonium.
• The majority of the elements on the left side
of the table are metals. The physical properties of
metals include luster, malleability, ductility, and
conductivity. Metals vary in reactivity.
• The nonmetals are confined to the right
side of the table.
In the Bohr’s model of an atom, an atom has an energy
shell occupied by a specific number of electrons. Each electron shell
can hold only a certain number of electrons. The way the electrons
of an atom are distributed in the various energy levels or electron
shells is called electronic configuration.
The lowest energy level is the one nearest to the nucleus.
This is the energy level that electrons occupy first. It can
accommodate a maximum of 2 electrons. If there are more than 2
electrons, they occupy the succeeding higher energy levels. The
highest energy level that an electron occupies is referred to as the outermost shell or valence shell.
The electrons in the valence shells are called valence electrons. These electrons are the ones
involved in chemical reactions. The chemical properties of an element depend on the number of
valence electrons.
Looking at the table below, Representative elements has their respective valence electron
number. You can see that the number of their old grouping is also the number of their valence
electron. As stated in the Octet Rule elements gain or lose electrons to attain an electron
configuration of the nearest noble gas, to become stable. When an atom/element gains an electron
it becomes negatively charged ion and it is called ANION, while if an atom/element loses an
electron it becomes positively charged ion and it is CATION.
Source: Illustrated in the Grade 8 – Science Learning
Module published on 2013.
Source: https://sites.google.com/site/
comerschemistryclassroom/useful-
links/bohr-s-model-2
5. 5
Let’s Practice
This section of the lesson will let you experience sorting out or grouping things. This will
help you get hooked on how scientists have meticulously arranged element in the periodic table.
Activity 1. Sorting: Easy as nuts?
Materials Needed:
✓ a large size pack of mixed nuts (snack junk foods containing different kind such nuts, corn,
peas, etc.)
✓ clean saucers or any small plate will do
✓ timer (any kind of timer can be used)
Procedure:
1. Put the mixed nuts in a plate.
2. Set the timer in two (2) minutes and start sorting the content of the mixed nuts.
Question:
1. Did you finish sorting out the mixed nuts at a given time? ___________________________________.
2. What are your basis in sorting out your mixed nuts. _________________________________________
____________________________________________________________________________________________.
3. How did you find sorting out the mixed nuts? Is it easy/hard? Why? _________________________
____________________________________________________________________________________________
RUBRICS:
6. 6
Activity 2. Sorting: How do they do it?
Directions. Fill in the missing data that is needed to complete the identification card of scientist
who contributed in the development of periodic table. Write your answer on a separate sheet
-Illustrations source: https://www.rsc.org/periodic-table/history/about
RUBRICS:
7. 7
Let’s Do More
Activity 3: Metal…Metal…How reactive are you?
Materials:
✓ paper
✓ pen/pencil
✓ Periodic Table
Procedure
1. A reaction does not always happen between a metal and a compound. There is an existing
definite order of reactivity existing among metals and hydrogen according to their ability to displace
one another. This arrangement is called the metal reactivity series or activity series of metals. The
activity series is an arrangement of metals according to decreasing order of reactivity, as shown
below.
Q1. Potassium, sodium, lithium are metals belonging to Group 1. In this group, how does
reactivity vary – increasing or decreasing from top to bottom in the periodic table?
_______________________________________________________________________________________________
Q2. Does the relative reactivity of calcium and magnesium follow this trend?
_______________________________________________________________________________________________
Q3. Sodium, magnesium and aluminum belong to Period 2. Does reactivity increase or
decrease from left to right among elements in a period.
______________________________________________________________________________________________
3. From your answer in Q1-Q3, make a generalization of the variation of the reactivity of metals
for those belonging to a group and for those belonging to a period.
_______________________________________________________________________________________________
_______________________________________________________________________________________________
________________________________________________________________________________________.
Source: Illustrated in the Grade 8 – Science Learning Module published on 2013.
8. 8
4. Refer to the table, Activity Series of Metals.
Q6. Which will be more reactive in the following pairs of metal in every case?
a. Mg or Na with HCl ____________________________
b. Ag or Al with HCl ____________________________
c. Fe or Zn with CuSO4 ____________________________
Activity 4. Metallic Trendy
Objectives:
✓ compare metallic property of elements
✓ explain the trends in metallic property
Materials Needed:
✓ Periodic Table of Elements
✓ Paper
✓ pen
Procedure:
Refer to the skeleton illustration of periodic table,
metallic character increases from top to bottom and
decreases from left to right as seen in the figure on the
right. Metallic property relates to how easy it is for an
atom to lose an electron. On the other hand, nonmetallic
property relates to how easy it is for an atom to gain an
electron. For instance, If you are going to compare the
following elements which are more metallic:
a. Na and Cs - Cs is more metallic because it belongs to period 6 and metallic
character increases as you go down the group.
b. K an Ga - K is more metallic because it belongs to group 1 and metallic
character decreases as you go across the group.
2. Choose among the pair of elements is more metallic.
a. Be and Ca ___________
b. Cl and F _____________
c. Rb and Li ____________
3. Arrange the following sets of element into increasing metallic character.
a. Si, Mg, S, Na, Cl ____________________________________
b. Te, O, Po, S, Se _____________________________________
Source: Illustrated in the Grade 8 – Science
Learning Module published on 2013.
9. 9
Activity 5. Atomic Radius Trends
Objectives:
✓ compare atomic radius of elements
✓ explain the trends in atomic radius
Materials Needed:
✓ Periodic Table of Elements
✓ Paper
✓ pen
Procedure:
1. Study the figure presented.
2. Determine the trend in terms of atomic radius.
3. Choose among the pair of elements bigger atomic
radius.
a. Be and Ca ___________
b. Cl and F _____________
c. Rb and Li ____________
4. Arrange the following sets of element into
increasing size in atomic radius.
a. Si, Mg, S, Na, Cl
____________________________________
b. Te, O, Po, S, Se
_____________________________________
Comprehension Check
Directions: Read and analyze the following questions. Write your answer on your Science study
notebook.
1. What happens to the atomic radius across a period?
_____________________________________________________________________________________________
2. What happens to the atomic radius down a group?
_____________________________________________________________________________________________
RUBRICS:
Source: https://saylordotorg.github.io/text_introductory-
chemistry/s12-05-periodic-trends.html
10. 10
What I Have Learned
I. Directions: Answer the questions with the proper information using your notes, book, and the
periodic table. Write your answer on a clean sheet of paper.
1. Define a family. _______________________________________________________
2. What is a period? ________________________________________________________
3. In what period do the following elements belong?
a. He _______________ b. Ge _________________
c. Rb _______________ d. I __________________
4. In what group do the following elements belong?
a. Sulfur _______________ b. Ca _________________
c. Iodine _______________ d. Fe _________________
5. The periodic law states that “______________________________________________________________”
Short Response
What is the importance of a periodic table?
_______________________________________________________________________________________________
_______________________________________________________________________________________________
________________________________________________________________________________________.
RUBRICS:
11. 11
Let’s Assess
Multiple Choices. Identify the choice that best completes the statement or answers the question.
Write your answer on a separate sheet of paper.
________1. What was the contribution of Mendeleev in developing the periodic table?
A. discovering protons
B. discovering Mendelevium
C. creating today’s atomic model
D. publishing the first periodic table
________2. What do you call each column of the periodic table?
A. a group
B. a period.
C. an isotope.
D. an element.
________3. What do you call each row of the periodic table?
A. a group
B. a period.
C. an isotope.
D. an element.
________4. According to the periodic law, how do elements that have similar properties appear?
A. to the left of each other
B. to the right of each other
C. at every tenth element
D. at regular intervals periodically
________5. Why do elements within the same group in the periodic table have similar properties?
A. They have the same number ions.
B. They have the same number neutrons.
C. They have the same number protons.
D. They have the same number valence electrons.
12. 12
________6. What have you observed in the elements as you move down the same column of the
periodic table?
A. Elements have fewer protons
B. Elements have a lower atomic number
C. Elements have more energy levels
D. Elements have a different group number
________7. What is the tendency of an element having one valence electron?
A. be highly reactive
B. forms ions
C. becomes charged
D. all of the above
________8. Which is not a family of the periodic table?
A. alkaline-earth metals
B. anions
C. halogens
D. noble gases
________9. What do you call atoms that gain or lose electrons?
A. metals.
B. nonmetals.
C. ions.
D. isotopes.
________10. Who proposed the law of octaves which classifies elements based on the fact that
similar properties could be noted for every eight elements when they are arranged in order of
increasing atomic masses?
A. Dmitri Mendeleev
B. Henry Moseley
C. Johann Doberiener
D. John Newlands
Prepared by:
JOEMAR S. CUSTODIO
SST-I
BULBUGAN NATIONAL HIGH SCHOOL
Sta. Maria, Gloria
Division of Oriental Mindoro
13. 13
References
Annenberg Foundation (2012). Workshop session 2: The particle nature of matter: Solids, liquids,
and gases. In Essential Science for Teachers: Physical Science. Retrieved
fromhttp://www.learner.org/courses/essential/physicalsci/support/ps_session2.p df
Atkins, Peter, and Jones, Loretta (2002). Chemical Principles: The Quest for Insight, second
edition. New York: W. H. Freeman.
Brady, J.E.,& Senese, F. (2004). Chemistry: Matter and its changes (4th ed.). River Street
Hoboken, NJ: John Wiley & Sons, Inc.
Bucat, R.B. (Ed.). (1984). Elements of chemistry: Earth, air, fire and water, Vol. 2. Canberra City,
A.C.T., Australia.
Chang, Raymond (2002). Chemistry, seventh edition. Boston: McGraw-Hill.
Elvins, C., Jones, D., Lukins, N., Miskin, J., Ross, B., & Sanders, R. (1991).Chemistry one:
Materials, chemistry in everyday life. Port Melbourne, Australia: Heinemann Educational
Australia.
Fricke, M. (1976). "Quantum Mechanics." In Method and Appraisal in the Physical Sciences: The
Critical Background to Modern Science, 1800–1905, ed. C. Howson. New York: Cambridge
University Press.
Fong, P. (1962). Elementary Quantum Mechanics. Reading, MA: Addison-Wesley.
Philippines. Department of Education. 2013. Grade 8 Science Learner’s Module. First Edition.
Meralco Avenue, Pasig City
Philippines. Department of Education. 2013. Grade 8 Teacher’s Guide. First Edition. Meralco
Avenue, Pasig City
Mendoza, E.E. &Religioso, T.F. (1997).Chemistry.Phoenix Publishing House, Inc. Quezon City.
The American Chemical Society (1988).Chemistry in the community.Kendall/Hunt Publishing
Company. Dubuque, Iowa.
Tsaparlis, Georgios. "Atomic Structure." Chemistry: Foundations and Applications.
2004.Encyclopedia.com. 18 May. 2016 <http://www.encyclopedia.com>.
14. 14
Answer Key
Let’s Try
1. A 6. B
2. A 7. B
3. C 8. D
4. D 9. C
5. D 10. A
Let’s Assess
1. D
2. A
3. B
4. D
5. D
6. C
7. A
8. B
9. C
10.D
Let’s Practice
Activity 1 and Activity 2. Answers may vary
Activity 3
Q1. The reactivity increases as it goes from top to bottom of the
periodic table.
Q2. Yes, Group 2 metals followed the same trend for Group 1 metals
in terms of reactivity.
Q3. The reactivity decreases as it goes from left to right of the
periodic table.
Q6.
a. Na is more reactive than Mg with HCl
b. Al is more reactive than Ag
c. Zn is more reactive than Fe
Activity 4
2. a – Ca 3. a – Cl, S, Si, Mg, Na
b – Cl b – O, S, Se, Te, Po
c – Rb
Activity 5
3. a – Ca 4. a – Cl, S, Si, Mg, Na
b – Cl b – O, S, Se, Te, Po
c – Rb
Comprehension Check
1. Atomic radius decreases across the period from left to right.
2. Atomic radius increases down a group from top to bottom.
What I Have Learned
1. Answers may vary
2. Answers may vary
3. a – 1 c – 5
b – 4 d – 5
4. a – 16/ VI A / oxygen group
b – 2 / II A / alkaline earth metal
c – 17 / VII A / Chalcogen
d – 8
5. “the properties of elements vary periodically with atomic number”
Short Response (Answers may vary)