Question

Name a trivalent cation with its formulae and valency.

Answer 1

Trivalent cation:

1. The cation with a $+3$ charge as its valency is called a trivalent cation.
2. When an atom loses three electrons from its outermost shell, it becomes a trivalent cation.

Aluminium $\left(\mathrm{Al}\right)$ is the trivalent cation. Its formula is ${\mathrm{Al}}^{3+}$and its valency is $3$.