State three reasons for the following fact:
$(a)$ Sulphur is a non-metal.
One of the reasons must be supported with a chemical equation.

(N/A) Sulphur $(S)$ is a non-metal because:
$1.$ It is brittle in its solid state and possesses low melting and boiling points.
$2.$ It is an electronegative element that forms anions $(S^{2-})$ and acts as a poor conductor of heat and electricity.
$3.$ It reacts with oxygen to form acidic oxides,which dissolve in water to produce acids.
Chemical equation:
$(a) S(s) + O_2(g) \rightarrow SO_2(g)$
$(b) SO_2(g) + H_2O(l) \rightarrow H_2SO_3(aq)$
These properties are characteristic of non-metals,confirming that sulphur is a non-metal.