Question

Calculate the energy required for the process

He⁺ (g) → He²⁺ (g) + e^-

The ionization energy for the H atom in the ground state is 2.18 x 10^-18 J atom^-1.

Answer 1

Ionisation potential (energy) for the ground state H atom = 2.18 x 10^-18 J

The nuclear charge of helium is 2. Therefore,

E_He+ → He²⁺ = Z² x E_H→H+

Energy required for removing one electron from

He⁺ = 2² x (2.18 x 10^-18 J)

= 4 x 2.18 x 10^-18 J

= 8.72 x 10^-18 J