Question

which of the following compounds is an ionic compound?
a. cao
b. nh₃
c. sf₆
d. h₂o

Explanation:

Ionic compounds are formed by the transfer of electrons from a metal to a non - metal. Calcium (Ca) is a metal and oxygen (O) is a non - metal in CaO. In NH₃ (nitrogen and hydrogen, both non - metals), SF₆ (sulfur and fluorine, both non - metals), and H₂O (hydrogen and oxygen, both non - metals), the compounds are formed by the sharing of electrons (covalent bonding) as they are made up of non - metals only.

Answer:

A. CaO