Question

Explain the halogens have maximum electron gain enthalpy

Answer 1

The high electron gain enthalpy of halogens can be explained by the following -

-Halogens have a small size and high electron charge.

-Their electronic configurations are ns2 and np5.

Thus they have a high tendency to gain one electron to achieve a full filled outer most shell to achieve a noble gas configuration and have high values of electron gain enthalpy.