Which of the following solids could be described in this way: high melting point, hard solid, poor electrical conductor, non-electrolytic solution.

Which of the following solids could be described in this way: high melting point, hard solid, poor electrical conductor, non-electrolytic solution.




a. NH3
b. Mg
c. H2S
d. MgCl2
e. SiO2



Answer: E