The increasing order of electron affinity for $Cl, Br$ and $I$ is .....

Which one of the elements has the maximum electron affinity?

The electron affinity values of elements $A, B, C$ and $D$ are respectively $-135, -60, -200$ and $-348 \ kJ \ mol^{-1}$. The outer electronic configuration of element $B$ is

The correct sequence of electron gain enthalpy of the elements listed below is
$A$. $Ar$ $B$. $Br$ $C$. $F$ $D$. $S$
Choose the most appropriate from the options given below:

Explain the trends in electron gain enthalpy across periods and down groups.

The amount of energy released due to the addition of an extra electron to the outermost orbit of a gaseous atom is called: