Question

How does atomic radius vary in a period and in group?​

Answer 1

Answer:

Atomic radius decreases when we move from left to right in period because-

Protons attract electrons and make atoms smaller than previous one.

Answer 2

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In general, the atomic radius decreases as we move from left to right in a period with an increase in nuclear charge of the element. The atomic radius increases when we go down a group because of the addition of extra shell.