Question

Which of the following element has maximum electron affinity?

Options

• Mg

• Al

• Na

• Cl

Answer 1

Cl

Explanation:

All the given options are third-period elements, where electron affinity generally increases across a period from left to right as the nuclear charge rises and the atomic radius decreases. Sodium (Na), magnesium (Mg), and aluminium (Al) are metals that prefer to lose electrons rather than gain them. Chlorine (Cl) is a halogen non-metal with seven valence electrons; it strongly attracts and accepts an incoming electron to achieve a highly stable octet configuration, giving it the highest electron affinity among the choices.