Answer: c) calcium bromide
Explanation: a) Calcium oxide: It is represented by [tex]CaO[/tex] which contains [tex]Ca^{2+}[/tex] as a metal and [tex]O^{2-}[/tex] as a non metal. Thus the ratio of metal to non metal ions is 1:1.
b) Calcium sulfide: It is represented by [tex]CaS[/tex] which contains [tex]Ca^{2+}[/tex] as a metal and [tex]S^{2-}[/tex] as a non metal. Thus the ratio of metal to non metal ions is 1:1.
c) Calcium bromide: It is represented by [tex]CaBr_2[/tex] which contains [tex]Ca^{2+}[/tex] as a metal and [tex]Br^{-}[/tex] as a non metal. Thus the ratio of metal to non metal ions is 1:2.
d) Calcium phosphide: It is represented by [tex]Ca_3P_2[/tex] which contains [tex]Ca^{2+}[/tex] as a metal and [tex]P^{3-}[/tex] as a non metal. Thus the ratio of metal to non metal ions is 3:2.
