4.17     Define electronegativity. How does it differ from electron gain enthalpy ?

Answers (1)
D Divya Prakash Singh

Electronegativity is the ability of an atom in a compound to attract a bond pair of electrons towards itself. It cannot be measured and it is a relative number.

The electron gain enthalpy, \triangle_{eg}H, is the enthalpy change, when a gas phase atom in its ground state gains an electron. The electron gain process may be exothermic or endothermic.

An element has a constant value of the electron gain enthalpy that can be measured experimentally.