Question

define atomic size.how does it vary in a group or a period

Answer 1

It is distance between the centre of the nucleus to the outermost shell of an isolated electron.
In group it increases from top to down
In period it remains the same

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Answer 2

HELLO MATE.....


Atomic size is the distance from the nucleus of an atom to the valance shell of that atom.



»» On moving from left to right in a period, the atomic size decreases.

»» On moving down a group, the atomic radii of atom gradually increases.


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