Chemistry - Halogen Derivative Question with Solution | TestHub

Nucleophilicity decreases as we move from left to right in the period. This happens because as we move from left to right, the electronegative nature increases and as a result tendency to attack a positive charge decreases. Hence, the order of nucleophilicity is:

$\mathrm{F}<\mathrm{O}<\mathrm{N}<\mathrm{C}$

Hence,${}^{-}\text{C}{\text{H}}_3$has highest nucleophilicity.