Which of the following transitions involves maximum amount of energy?

Options

A. `M^(-) (g) rarr M (g)`
B. `M(g) rarr M^(+) (g) `
C. `M^(+) (g) rarr M^(2+) (g)`
D. `M^(2+) (g) rarr M^(3+) (g)`

Answer

D

Explanation

`M^(+2) rarr M^(3+)` after the removel of `2e^(-)` the nuclear charge per `e^(-)` increases,due to which high energy is required to remove `3e^(-)`.