Statement-based question on ionization enthalpy and electron gain enthalpy trends.

Solution:

Ionization enthalpy generally increases across a period due to increase in effective nuclear charge.

Electron gain enthalpy generally becomes more negative across a period because atoms gain electrons more easily.

Exceptions occur due to extra stability of half-filled and fully-filled orbitals.

Answer: Ionization enthalpy increases across a period, while electron gain enthalpy generally becomes more negative.