Here's why:

* Sodium (Na): This is the positively charged ion (cation) in the compound.

* Hydrogen sulfate (HSO₄⁻): This is the negatively charged ion (anion) in the compound. It's a combination of hydrogen (H) and sulfate (SO₄).

* Balancing the charges: Sodium has a +1 charge, and hydrogen sulfate has a -1 charge. Therefore, one sodium ion balances out one hydrogen sulfate ion.