The amount of energy released on the addition of an electron in the outermost shell of an atom is called:

In which of the following processes is energy absorbed?

In which of the following processes is energy released?

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 element has maximum electron affinity?

In which of the following processes is energy liberated?