To determine the total number of atoms in sulfur dioxide (SO2), we need to consider the chemical formula and count the individual atoms.
In sulfur dioxide (SO2), there is one sulfur atom (S) and two oxygen atoms (O). The subscripts in the chemical formula indicate the number of each type of atom present.
Therefore, in one molecule of sulfur dioxide (SO2), there are a total of three atoms: one sulfur atom and two oxygen atoms.