Here's how to break down the number of atoms in K₂CrO₄ (potassium chromate):

* K (Potassium): The subscript "2" after the K indicates that there are two potassium atoms.

* Cr (Chromium): There is no subscript after Cr, which means there is one chromium atom.

* O (Oxygen): The subscript "4" after O indicates that there are four oxygen atoms.

Therefore, there are a total of 7 atoms in one molecule of K₂CrO₄.