Question

write one basic difference between the terms electron gain enthalpy and electronegativity

Answer 1

electron gain enthalpy is defined as the change in enthalpy when an electron enters in an atom at gaseous state
electronegativity is the property of element to attract shared pair of electrons towards themselves

Answer 2

electron gain enthalpy is defined for the tendency of an isolated gaseous atom to gain an electron
but electronegativity is defined as tendency to gain a shared pair of electron