Here's how to determine the number of atoms in cobalt phosphate (Co3(PO4)2):

1. Identify the Elements:

* Cobalt (Co)

* Phosphorus (P)

* Oxygen (O)

2. Determine the Number of Atoms of Each Element:

* Cobalt (Co): There are 3 cobalt atoms (indicated by the subscript 3).

* Phosphorus (P): There are 2 phosphorus atoms (indicated by the subscript 2).

* Oxygen (O): There are 8 oxygen atoms (2 phosphorus atoms * 4 oxygen atoms per phosphate ion = 8 oxygen atoms).

3. Calculate the Total Number of Atoms:

* 3 cobalt atoms + 2 phosphorus atoms + 8 oxygen atoms = 13 atoms

Therefore, there are 13 atoms in one molecule of cobalt phosphate (Co3(PO4)2).