Answer:
a). 5 atoms
b). 13 atoms
Explanation:
Atoms: It is the smallest unit of the element.
Atomicity : Total number of atoms present in the molecule. For e.g each molecule of [tex]N_{2}[/tex] gas contain 2 atoms of nitrogen.
[tex]CH_{4}[/tex] = 1 atom of C + 4 atoms of H
= 5 atoms
[tex]Mg_{3}(PO_{4})_{2}[/tex]
= 3 atoms of Mg + (1 atom of P + 4 atoms of O )[tex]\times2[/tex]
= 3 +5 [tex]\times 2[/tex]
= 3 + 10
= 13 atoms
