Question

How does the number of valency electron and valency vary on moving from left to right in the second period of the periodic table

Answer 1

HERE IS YOUR ANSWER

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While moving from left to right in periodic table, the valency of elements start from 1,2,3,4 and then decrease in 3,2,1,0.
In simple, the valency of elements goes on like
1,2,3,4,3,2,1,0.


This rule is applicable for all periods while moving from left to right.

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