Question

Directions: Count the number of atoms.


Ar
Co2
Na3PO4
SO3
NaC2H3O2

Answer 1

We have:
1 atom of Ar
2 atoms of O and 1 atom of C (3 atoms)
3 atoms of Na,1 atom of P and 4 atoms of O (8 atoms)
1 atom of S and 3 atoms of O (4 atoms)
1 atom of Na,2 atoms of C,3 atoms of H,2 atoms of O(8 atoms)