Question

Consider the following elements :
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.

Lakhmir Singh Chemistry Class 10

Answer 1

1 group : Na.. K.. Li coz they have same valence electrons that is 1
2 group : Ca.. Ba.. Sr.. Coz they have same Valence electrons that is 2
3 group : Cl.. I.. Br cos these three require only 1 electron to get stable

Answer 2

Explanation:

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