Explain, with suitable examples, the following:
(iii) Electron-rich hydrides.

Explanation

Dihdrogen forms molecular compounds with most of the p - block elements. These are type.
(iii) Electron rich hydrides: The hydrides whose central atom is having octet and among the electron pairs around the central atom if some are bond pairs and some are lone pairs are called electron rich molecule. Eg: `NH_(3), H_(2)O`. These contain electrons which are present as lone pairs.