Question

The correct order of electron gain enthalpy with -ve sign of the elements of oxygen family in the periodic table is​

Answer 1

Explanation:

Halogens have high electron affinity because by gaining an electron they achieve the stable noble gas configuration. Also, it increases along a period and decreases on moving down a group, but the value of electron gain enthalpies for the elements are Cl = 349, F = 333, S = 200, O = 142.