Which of the following transformations is considered in defining ionization energy ?

Options

A. `A(g) + aq to A^(+) (aq) + e^(-)`
B. `A(g) + e^(-) to A^(-) + e^(-)`
C. `A(g) to A^(+)(g) + e^(-)`
D. `A(aq) to A^(+)(aq) + e^(-)`

Answer

C

Explanation

Ionization energy is defined as amount of energy required to remove the most loosely bound electron, the valence electron of an isolated gaseous atom to form a cation.