Question

Write down the Monovalent, Divalent, Trivalent and Tetravalent Negative Valencies.​

Answer 1

Answer:

The combining capacity of an atom is known as its valency. The number of bonds that an atom can form as part of a compound is expressed by the valency of the element.

Monovalent

An atom, ion, or chemical group with a valence of one, which thus can form one covalent bond is called monovalent.

Examples

Atoms that are monovalent are

Hydrogen

Lithium

Sodium

Chlorine

Divalent

An atom, ion, or chemical group with a valence of two, is called divalent.

Examples

Atoms that are divalent are

Beryllium

Oxygen

Magnesium

Sulphur

Trivalent

An atom, ion, or chemical group with a valence of three, is called trivalent.

Examples

Atoms that are trivalent are

Boron

Nitrogen

Aluminium

Phosphorous