Question

why atomic radius of oxygen is greater than nitrogen and fluorine as atomic radius increases as we move from left to right in a period?

Answer 1

Hello friend!!!!

Your question's wrong, atomic radius decreases as we move from left to right along a period.

This is because,

◆The number of shells in an atom remain same along the period

◆But number of proton increases

◆As a result the z-effective increases and thus the atom becomes smaller

Now the radius of Oxygen is slightly greater than fluorine because Oxygen is the 1st element where the electrons start pairing in p - orbital. Since it is the 1st time electrons pair in the p-orbital repulsion takes over and thus it's size increases slightly from that of fluorine

HOPE THIS HELPS.... ☺️