Question

When a sodium atom becomes an ion the size of the atom?

Answer 1

The size of atom reduces

Electronic configuration of sodium -
2,8,1

In order to become stable it loses one electron and becomes positive ion.
It's size reduces.

Answer 2

When a sodium atom becomes an ion the size of the atom decreases.

Metals form ions by loosing electrons. Sometimes, electrons are lost in such a way that a complete shell is gone. As such, the size of the atom becomes smaller and the attraction of the nucleus for electrons increases.

Sodium forms an ion by the loss of its outermost shell that contains its only valence electron. Hence, when sodium atom becomes an ion, the size of the atom decreases.

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