Question

What does the following formula stand for?

${\mathrm{HgCl}}_2$

Answer 1

This Formula contains Mercuric [Mercury(II)] ion $\left[{\mathrm{Hg}}^{+2}\right]$ and Chloride ion $\left[{\mathrm{Cl}}^{-}\right]$.

This Chemical is Mercuric Chloride or [Mercury(II)] chloride.

where (II) indicates valency of Mercuric ion