Question

8. State the number of atoms present in each of the following chemical species
(a) C0,2-
(b) PO,
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Answer 1

The number of atoms in CO2 = the atom of C + the atoms of O

                                                   = 1+2

                                                   = 3

The number of atoms in PO  = the atom of P + the atom of O

                                                 = 1+1

                                                 = 2