In any period, the valency of an element...

In any period, the valency of an element with respect to oxygen

A

Increases one by one from IA to VIIA

B

Decreases one by one form IA to VIIA

C

Increases one by one from IA to IVA and then decreases from VA to VIIA one by one

D

Decreases one by one from IA to IVA and then increases from VA to VIIA one by one

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The correct Answer is:

A

So the valency of element increases from IA to VII A.
But this trend is only applicable for short period (period 2 and 3) elements.

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