# Which one of the following arrangements represents the correct order of electron gain enthalpy

$(a)\;S < O < Cl < F \\(b)\;Cl < F < S < O \\ (c)\;F < Cl < O < S \\ (d)\; O < S < F < Cl$

The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent amion is called electron gain ethalpy .
$O < S < F < Cl$
Hence d is the correct answer.
edited Oct 26 by meena.p