Which of the following statements is/are incorrect ?

Options

A. Ionisation energy of `A^(-)` is greater than A when A is a halogen atom.
B. Ionisation energy of `A^(+)` is greater than that of `A^(2+)` when A is the number of alkali metals
C. Successive ionisation energy is always increasing for 1st and 2nd period element
D. Electron affinity value of `A^(+)` is numerically identical with the ionisation potential of `A^(-)` [for any atom]

Answer

A, B, D