Question

What are the three types of covalent hydrides?

Answer 1

Covalent hydrides:

Covalent hydrides are compounds containing either Hydrogen or non-metal compounds that share electron pairs with another element through equivalent electronegativity between them.

Types of covalent hydrides:

1. Electron precise: There are exact number of electrons to form covalent bond. For example, Methane (${\mathrm{CH}}_4$)
2. Electron deficient: There are less number of electrons to form covalent bond. For example, Diborane (${\mathrm{B}}_2{\mathrm{H}}_6$)
3. Electron rich: There are one or more lone pair of electrons around the central atom. For example, water (${\mathrm{H}}_2\mathrm{O}$)

Note: Due to their low boiling and melting points, covalent hydrides are typically gases or volatile liquids.