Here's how to break down the name:
* Mn: This represents manganese, a transition metal. Its charge is +2 in this compound.
* SO4: This is the sulfate anion (SO4^2-)
* .7H2O: This indicates that there are seven water molecules associated with each formula unit of manganese(II) sulfate. This is why it's called a hydrate.
So, the full name combines the metal cation, the anion, and the number of water molecules, giving us manganese(II) sulfate heptahydrate.