Notes

Resemblance with Alkali Metals…

Hydrogen shows resemblance with alkali metals in the following respects:
(i) Like alkali metals, hydrogen has similar outermost electronic configuration.
(ii) It has one valence electron in s-orbital like alkali metals. It can lose one electron to form H+ ion like alkali metals.
(iii) Like alkali metals, the normal valency of hydrogen is 1.
(iv) Like alkali metals, hydrogen exhibits electropositive character.