Question

Which is correct regarding the size of atom 1 No 2) B < Ne 3) V > Ti 4) Zr > Hf​

Answer 1

Answer:

N<O

you missed your 1 option.

Next time post full questions.

Answer 2

We will consider each option one-by-one:

(1) N>O: Nitrogen has larger atomic radius than Oxygen as Oxygen has 1 more electron than Nitrogen but its nuclear charge also increases, thereby exerting a greater force of attraction on the electrons, hence its size decreases.

(2) B < Ne : While going across a period the size of an atom decreases as charge increases, therefore Neon is smaller than Boron.

(3) V>Ti : Vanadium(Z= 23) is smaller than Titanium(Z=22) due to greater force of attraction exerted by the larger nucleus of Vanadium.

(4) Zr > Hf: Zirconium and Hafnium have similar radii as the gradual increase in radius down a group is cancelled out by Lanthanoid contraction.

Hence option (1) is correct.