Question

Explain the monovalency of the
element sodium.​

Answer 1

Sodium is metal which has atomic number 11. It has 1 electron in its last shell which means it has 1 valence electron. In order to get stability by acquiring nearest noble gas configuration. Sodium prefers to loose 1 electron. Hence, we say that sodium has a valency of one and is thus monovalent.

valency is defined as the number of electron in the outer most shell of an element. As the third shell has one electron in it the valency of sodium is 1 or +1 as it losses that electron to form a cation and achieve noble gas configuration