Question

Define valency along with few examples.
[2 Marks]

Answer 1

The combining capacity of an atom/ion to form a compound is known as its valency.
[1 Mark]

Examples:
1) ${\mathrm{Na}}^{+}$ has a valency of 1.
2) ${\mathrm{Mg}}^{2+}$ has a valency of 2.
3) ${\mathrm{Al}}^{3+}$ has a valency of 3.

[1 Mark]