Question

What is the ionisation energy of hydrogen in the ground state?

Options

• \[3.40\,\mathrm{eV}\]

• \[10.2\,\mathrm{eV}\]

• \[13.6\,\mathrm{eV}\]

• \[12.09\,\mathrm{eV}\]

Answer 1

Ionisation energy is the energy that must be supplied to remove the electron completely from the atom. For hydrogen in its ground state, this energy is \[13.6\,\mathrm{eV}\].