On the basis of electron affinity, comment on the resemblance of hydrogen with halogens.

Explanation

Halogens have electronic configuration `ns^(2)np^(5)`. So, they have strong tendency to gain one electron to attain stable nearest noble gas configuration. Similarly, hydrogen with `1s^(2)` electronic configuration has a tendency to gain one electron and form `H^(-)` ion and attain helium gas configuration.