Question

in the second group of element which element has the smallest atomic size​

Answer 1

Answer:

F is the smallest atomic size

Answer 2

Answer:

All given elements are present in second and third periods. The atomic size decreases towards the right in a period as effective nuclear charge increases. Down the group size increases due to addition of a new shell.

Thus the order of size is Na>Mg>B>N.

Hence the smallest is N (Nitrogen).