Covalent bonds can occur where atoms share one or more pairs of electrons. which of the following would form a double covalent bond? view available hint(s) covalent bonds can occur where atoms share one or more pairs of electrons. which of the following would form a double covalent bond?
a. nacl
b. cl2
c. co2
d. nh3

The answer to your question is: CO2

Explanation:

The information given is correct, Covalent bonds occur when atoms share one or more pairs of electrons, but also, covalent bonds occur with nonmetals, then,

a.NaCl     This elements form an ionic bond, so this option is incorrect.

b.Cl2      Here there are two non metals  but the form one single covalent bond, so this option is incorrect.

c.CO2  Carbon dioxide forms 2 double covalent bonds.

d.NH3 ammonium only forms single covalent bonds

pure substance: iron,copper

impure substance: water,charcoal