The electron affinity values for the halogens show the following trend:

Which one of the elements has the maximum electron affinity?

Which of the given atoms has the greatest electron affinity?

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

Electronic configurations of four elements $A, B, C$ and $D$ are given below :
$(A)$ $1s^2 2s^2 2p^6$
$(B)$ $1s^2 2s^2 2p^4$
$(C)$ $1s^2 2s^2 2p^6 3s^1$
$(D)$ $1s^2 2s^2 2p^5$
Which of the following is the correct order of increasing tendency to gain electron :

Which electron affinity process would liberate the most energy?