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How does the valency vary in a period of long form of periodic table​

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Q:-how does the valency VARY in a period of long FORM of PERIODIC table

Ans:- In the periodic table period, the valency of an element first INCREASES and then decreases. ... The valency VARIES from +1 to +4 or -4 through these 8 elements, in the first 4 elements of these 8 elements. The valency varies from -3 to -1 from the 5th element to the 7th element of these 8 elements.

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