Question

Which of the following represents sulphite ion?

• A. $S{O}_4^{2-}$
• B. $S{O}_3^{2-}$
• C. $S{O}_4^{-}$
• D. $S{O}_3^{-}$

Answer 1

The correct option is

C

$S{O}_3^{2-}$

The symbol of sulphite ion is $S{O}_3^{2-}$. It is a polyatomic ion that has an overall charge of $-2$.

Polyatomic ions are ions that contain more than one atom. Polyatomic ions are created when a number of atoms come together to form a group. It is held together by covalent bonds.

Sulfate and sulfite ions are polyatomic ions that are formed by the combination of sulfur and oxygen atoms.

The chemical formula for sulfate and sulfite are $S{O}_4^{2-}$ and $S{O}_3^{2-}$ respectively.