lessonplan elements

Chemistry Lesson Plan

Elements of Chemistry: The Periodic Table1 Subject: Chemistry Grade level: 9-12 Author: Discovery Education modified by Ellen Rochford Overview

Following this activity, students will be able to: • Identify how to use a periodic table • Explain how the table was developed • Explain why elements have specific positions • •

Objectives

• Standards

Describe the atomic structure of an element Organize the first 18 elements of the periodic table according to their atomic mass, number of electron shells, and valence electrons, then compare their order within the periodic table Identify common physical properties and uses of elements within a family

This fulfills Indiana State Standard SCI.C.2 2010 Atomic Structure and the Periodic Table from SCI.C.2.1 2010 through SCI.C.2.6 2010.

Materials

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Procedures

Elements of Chemistry: The Periodic Table video o If not available, http://www.youtube.com/watch? v=0RRVV4Diomg Computer with Internet access Period table o Can use Periodic Table apps (e.g. Quick Periodic Table of Elements) Index cards o Paper can be used

1. Create a card for each of the first 18 elements including atomic number, element symbol, atomic name, and atomic mass. Mark copies to give a set to each group. Cover up all periodic tables in room. 2. Review definitions of element and an atom. Review structure of atom, including the nucleus, protons, electrons, and neutrons. Choose an element (Carbon) and dram Bohr’s model of atom using atomic number and atomic mass. Point out electron shells including valence shell. 3. Divide into groups and based upon facts on card fill in number of protons, electrons, and neutrons; a model of atom; number of electron shells; and number of valence electrons 4. Have each group order cards following the rules as stated: • Cards must be placed in order of atomic number

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Adapted from http://www.discoveryeducation.com/teachers/free-lessonplans/elements-of-chemistry-the-periodic-table.cfm Atomic Structure Unit

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Chemistry Lesson Plan

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All cards in same column must have same number of valence electrons • All cards in same row must have same number of electron shells 5. When task completed, reveal periodic table. 6. Point out that the periodic table is arranged by the same rules. Explain that each row is called a “period” and each column is called a “group”. Elements in the same group react similarly. 7. Explain the transition block of metals. 8. Show YouTube video explaining Mendeleev’s development of table, and how he organized it and predicted elements. 9. Divide class into 4 groups and assign each group one of the following: halogens, noble gases, alkali metals, and alkaline Earth metals. 10. Within each group partner up and pick one element that falls into category and research physical properties including: density, boiling point, melting point, and conductivity. 11. Once each partner group done, review research with larger group and identify the common physical properties of the category. 12. Have each larger group share what was learned. Assessment

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Assessment of what electrons, protons, and neutrons are via short quiz at the beginning of the second day worth 10 points. 5 participation points for filling in index card with information from step 3 5 participation points for arranging the cards into the order of the periodic table following directions given 5 participation points for researching and sharing information about the groups within the period table 25 points possible

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Retrived from http://www.chemicool.com/ (accessed 1/25/14)

Atomic Structure Unit

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