Question

Which is a binary ionic compound?
A.
MgCl2
B.
C6H12O6
C.
CO2
D.
PO43-
E.
CH4

Answer 1

A binary ionic compound is formed from two different elements, one being a metal and the other a non-metal, which combine to form an ionic bond.

Among the options provided:

A. MgCl2 (Magnesium chloride) - This is a binary ionic compound made from magnesium (a metal) and chlorine (a non-metal).

B. C6H12O6 (Glucose) - This is a molecular compound, not ionic.

C. CO2 (Carbon dioxide) - This is a molecular compound, not ionic.

D. PO4^3- (Phosphate) - This is a polyatomic ion, not a binary compound.

E. CH4 (Methane) - This is a molecular compound, not ionic.

Therefore, the correct answer is:
**A. MgCl2**