Question

What type of energy is required to convert a gaseous atom in the ground state to a cation?

• A. Free energy.
• B. Lattice energy.
• C. Ionization energy.
• D. Activation energy.

Answer 1

The correct option is C Ionization energy.

Ionization energy is required to convert a gaseous atom in the ground state to a cation. This energy overcomes attractive forces between nucleus and valence electrons and removes one or more electrons from gaseous atom in the ground state.

$Na\left(g\right)\to N{a}^{+}\left(g\right)+e^{-}$ $\Delta H=$ ionization energy

The enthalpy change for above process is ionization energy.