B < Be < N < O

Be < B < N < O

B < Be < O < N

B < O < Be < N

3.87 BM

4.89 BM

5.91 BM

6.92 BM

BF₃

CO₃²⁻

N atom in C₅H₅N

H₃O⁺

It deals with polarization.

Larger the size of cation, lager it polarizes the anion.

Smaller the size of cation, larger it polarizes the anion.

Larger the size of anion, larger it gets polarized by cation.

F₂ > Cl₂ > Br₂ > I₂

Cl₂ > F₂ > Br₂ > I₂

F₂ > I₂ > Cl₂ > Br₂

Cl₂ > Br₂ > F₂ > I₂