How many atoms are there altogether in a molecule of sodium sulfate?

Sodium sulfate is a chemical compound with the formula Na2SO4.

1. First, let's break down the formula:

   • Na is the symbol for sodium and there are 2 atoms of it in the formula (as indicated by the subscript 2).
   • S is the symbol for sulfur and there is 1 atom of it in the formula.
   • O is the symbol for oxygen and there are 4 atoms of it in the formula (as indicated by the subscript 4).

2. Now, let's add up the total number of atoms:

   • 2 sodium atoms
   • 1 sulfur atom
   • 4 oxygen atoms

So, there are 2 + 1 + 4 = 7 atoms altogether in a molecule of sodium sulfate.