Which of the following gives the correct increasing order of the atomic radii of 0,F and N ?

Options

A. O,F,N
B. N,F,O
C. O,N,F
D. F,O,N

Answer

D

Explanation

As we move from left to right in a period, the atomic number of each succeeding element increases by 1. So, the electrons are attracted close to the nucleus and hence, the atomic size decreases, along a period from left to right.
Therefore, the increasing order of radii is F, O, N as atomic number of F, O and N are 9,8 and 7 respectively. Due to which F belongs to `17^("th")` group. O belongs to `16^("th")` group and N belongs to `15^("th")` group.