Answer:
A: 13
Step-by-step explanation:
Element Symbol Number #
Strontium Sr 3
Phosphorus P 2
Oxygen O 8
13 oxygen atoms are represented.
3 atoms of Sr + 2 atoms of P + 8 atoms of O = 13 atoms total are present. Calcium phosphate chemical formula is given as Ca3(PO4)2.Nov 19, 2020
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