Question

In terms of electronic configuration explain the variation in the size of the atoms of element belonging to same period and same group

Answer 1

Answer:

same period

the size decreases as we move from left to right of the periodic table. This is due to increase in nuclear force of attraction exerting greater force on valence shell causing it to pull in.

same group

the size increases down the group. because there is addition of new shell in every period due to increase in atomic number