Question

Arrange the following according to decreasing atomic size of an element that is .. K,Na ,Mg .

Answer 1

K>Na>Mg is the correct order

Answer 2

HOLA MATE !!!

HOPE THIS HELPS YOU...

We know that as the cationic charge increase the apsize of the ion decrease,
then Mg will have smallest size.
Since K has more electrons compared to Na the size of K will be large due to presence of additional orbitals.

So ,the ascending order is,
Mg < Na < K






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