Question

Explain why there is variation in atomic radius in a group and period?​

Answer 1

Explanation:

Hi,

On moving across a period, the valence shell remains the same and the electrons are increasing by one unit. As a result, the nuclear charge increases thus the atomic radius decreases.

On moving down a group, the shells go on increasing.As a result, the nuclear charge decreases.

Thus, the atomic radius increases down a group.

Hope this helps.

Cheers!

Answer 2

Answer:

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