Homework Answers
Elements in the same -------- share similar chemical and physical properties:
Ans: Group
The group is the column in the periodic table. The elements in the group are arranged according to the valence shell (last shell) electronic configuration.
Example: The valence electronic configuration of Lithium enters 2s1. For Sodium it is 3s1 and so on. Li and Na belong to first group.
Similarly Fluorine has 2p5 and Chlorine has 3p5 valence shell electronic configuration. They both belong to 17th group.
Valence electrons generally govern the properties of elements.
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