Justify the position of hydrogen in the periodic table on the basis of its electronic configuration.

Explanation

If we consider hydrogen on the basis of electronic configuration, it resembles with alkali metals. So it can be placed in group 1 of periodic table. Like alkali metals, hydrogen also contains one electron.

On the other hand, hydrogen also resembles with halogens. It is because, hydrogen have one electron less than the nearest noble gas just like halogens.
Hydrogen ` to 1e^-` less than Helium
Chlorine` to 1e^-` less than Argon.
(Z= 17) (Z= 18) , a stable noble gas.
So only on the basis of electronic configuration, H can be placed both in group, as well as group. But there are some properties of hydrogen which do not resemble with both alkali metal as well as Halogens. So position of hydrogen is anomalous in periodic table.