Question

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How does the valency vary in a period on going from left to right?


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Answer 1

In every period from left to right, the valency first increases and then decreases. In every period, valency starts from 1 on the left side and moving to the right side, it increases up to 4 and then decreases. In the periodic table, the number of electrons in elements from left to right increases from 1 to 8.

Answer 2

Explanation:

on going to left to right in a periodic table the valency changes according to their valence electron.