Which of the following gives the correct increasing order of the atomic radii of O, F and N ?
(a) O, F, N
(b) N, F, O
(c) O, N, F
(d) F, O, N
Ans (d)
Sol
Along a period from left to right - Number of protons increases and valence shell remains the same.
Hence radius of the atom decreases.
Correct increasing order of the atomic radii of O, F and N:
F , O , N
Hence option (d) is correct.