Question

Question 18
State the number of atoms present in each of the following chemical Species

(a) $C{O}_3^{2-}$

(b) $P{O}_4^{3-}$

(c) $P_2{O}_5$

(d) $CO$

Answer 1

(a)$C{O}_3^{2-}$: 4 (1 Carbon + 3 Oxygen ).
(b)$P{O}_4^{3-}$: 5 (1 Phosphorus + 4 Oxygen ).
(c)$P_2{O}_5$: 7 (2 Phosphorus + 5 Oxygen ).
(d)$CO$: 2 (1 Carbon + 1 Oxygen ).