Question

which structure has the central atom placed correctly? o-o-s o-o s o-s-o

Explanation:

In a molecule, the central atom is usually the one with the lowest electronegativity (except for hydrogen). Sulfur (S) has a lower electronegativity than oxygen (O). In the structure \(O - S - O\), sulfur is in the middle, which is correct as it can form bonds with two oxygen atoms. In \(O - O - S\), oxygen is wrongly placed in the middle. The triangular structure \(O - O\) with \(S\) at the bottom is not a valid simple linear or common bonding arrangement for this context.

Answer:

\(O - S - O\)