Question

What is the proper name for MgSO4 7H2O?

Answer 1

Answer: Option (A) is the correct answer.

Explanation:

When two different atoms combine together in similar composition they result in the formation of a compound.

And when a chemical formula include water molecules then it is represented by a dot followed by compound formula and then number of water molecules along with water formula are written.

For example, $MgSO_{4}.7H_{2}O$ is a compound that has seven water molecules.

According to naming nomenclature, "hepta" will represent seven.

Thus, we can conclude that name of $MgSO_{4}.7H_{2}O$ is Magnesium sulfate heptahydrate.

Answer 2

A. magnesium sulfate heptahydrate 
that is what it stands for