The formula Na₃PO₄ represents sodium phosphate. Here's a breakdown of the formula:

* Na: This symbol represents the element sodium.

* 3: This subscript indicates that there are three sodium atoms in the molecule.

* P: This symbol represents the element phosphorus.

* O₄: This symbol represents the element oxygen, and the subscript 4 indicates that there are four oxygen atoms in the molecule.

In summary, sodium phosphate is composed of three sodium atoms, one phosphorus atom, and four oxygen atoms.