Question

Describe the gradation in valency across a period from left to right with examples

Answer 1

Answer:

In a group, the number of valence electrons is same in case of all the elements and therefore, have the same valency. In a period, valency increases from the left to right( ranging from 0-8) across the period. In a group, the atomic number decreases while going down the group.

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Answer 2

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