Final Answer:
The sulfite ion has one single bond, one double bond, and one unshared (lone) pair on the central sulfur atom.
Step-by-step explanation:
The sulfite ion (
) consists of a central sulfur atom bonded to three oxygen atoms. The Lewis structure of the sulfite ion shows one single bond (S-O), one double bond (S=O), and one unshared (lone) pair of electrons on the sulfur atom. This arrangement satisfies the octet rule for the oxygen atoms, allowing them to have a stable configuration with eight electrons in their valence shells.
The sulfur atom, in this case, forms a total of three pairs of electrons: one with a single bond, one with a double bond, and one unshared pair, resulting in the specified number of single bonds, double bonds, and unshared pairs.