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  4. In any period of the periodic table, valency of an element

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Q. In any period of the periodic table, valency of an element

Classification of Elements and Periodicity in Properties

Solution:

Valency of an element increases from 1 to 4 on moving from group LA. to IVA in a period and then decreases from 4 to 0 on moving from group VA to VIIA in periodic table