Question

The ratio of the ionization energy of H and Be⁺³ is ______.

Options

• 1 : 1

• 1 : 3

• 1 : 9

• 1 : 16

Answer 1

The ratio of the ionization energy of H and Be⁺³ is 1 : 16.

Explanation:

Ionisation energy of H atom = 13.6 eV

Here, Be⁽³⁺⁾ is H like atom.

∴ Ionisation energy of Be³⁺ ion = 13.6 × Z² = 16 × 13.6 eV