Question

s below:
pb3(po4)2
pb:
p:
o:
total:

Explanation:

Step1: Determine number of Pb atoms

The sub - script of Pb in $Pb_3(PO_4)_2$ is 3, so the number of Pb atoms is 3.

Step2: Determine number of P atoms

In the $PO_4$ group, the sub - script of P is 1, and there are 2 $PO_4$ groups. So the number of P atoms is $1\times2 = 2$.

Step3: Determine number of O atoms

In one $PO_4$ group, there are 4 O atoms, and there are 2 $PO_4$ groups. So the number of O atoms is $4\times2=8$.

Step4: Calculate total number of atoms

The total number of atoms is $3 + 2+8=13$.

Answer:

Pb: 3
P: 2
O: 8
Total: 13