Which statement concerning MgBr2 is true?
A. MgBr2 has properties similar to sodium metal and chlorine gas.
B. MgBr2 is a homogeneous mixture.
C. MgBr2 is a heterogeneous mixture.
D. The percentage of Mg in MgBr2 is dependent on where the sample is obtained.
E. MgBr2 is a compound composed of Magnesium and Bromine