explain the result of activity 5.6 of chapter 5 , chemistry ?

1.	explain the result of activity 5.6 of chapter 5 , chemistry ?
Answer» Result1. On going from left to right in a period , the valency first increases and decreases . For eg.valency of sodium is 1, valency of aluminum is 3(increased), valency of potassium is 1( decreases).2. On going down the group, valence remains same. For eg.Group 1 has a valency of 1, group 2 has a valency of 2 etc.

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