To determine the number of atoms present in the compound manganese sulfate, we need to consider the chemical formula of the compound, which is MnSO₄.

In one molecule of manganese sulfate, there are the following atoms:

- 1 atom of manganese (Mn)

- 1 atom of sulfur (S)

- 4 atoms of oxygen (O)

Therefore, there are a total of 6 atoms present in one molecule of manganese sulfate.