Potassium (K), an alkali metal, and magnesium (Mg), an alkaline earth metal, both combine readily with bromine (Br), a halogen. What compound will each element (K and Mg) most likely form with bromine?

Question

Potassium (K), an alkali metal, and magnesium (Mg), an alkaline earth metal, both combine readily with bromine (Br), a halogen.  What compound will each element (K and Mg) most likely form with bromine?
A. 
KBr and Mg2Br

B. 
KBr and MgBr

C. 
K2Br and Mg2Br

D. 
KBr and MgBr2

GPT 3.5 · Answer

B. KBr and MgBr