In this Lesson, the patterns of chemical and physical properties that lead to the grouping of atoms in the periodic table are further examined. Trends in electron affinity and group chemistry will be correlated with their positions in the Periodic Table.

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• Examine the variations in electron affinity and the chemical properties of atoms  that are found as compare atoms in the same groups of the table.

• Correlate these trends with the electronic configuration and structure of the atoms involved.

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• Electron Affinity

• Chemistry, The Central Science Chapter 7,  7.4 - 7.7

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Class Notes

• Chapter 7 notes section 7.5

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• Chapter 7:  43, 89, 47, 49, 53 a,cd, 55, 57, 63, 80

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