Question

On moving from left to right in a period what happened to the valency and why

Answer 1

Explanation:

When we move from left to right in periodic table valency increases. But after 4, it decreses also. The electrons present in the last shell determine the valency of a particular element. If the number of valence electrons >4: valency = 8 - number of valence electrons

Answer 2

HeYa!

When we move from left to right in a periodic table, the valency first increases till 4 and then decreases. The electrons present in the last shell determine the valency of a particular element. If the no. of valence electrons>4 , then valency is 8-No.of valence electrons.

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