Magnesium oxide, MgO, melts at 2,800^$\circ$C and is very hard. The liquid conducts electricity very well. What kind of crystal is this A) Ionic Crystal B) Covalent Crystal C) Metallic Crystal D) Molecular Crystal E) Amorphous (Not a regular crystal)

Question

Quizplus · Accepted Answer

Magnesium oxide is composed of Mg2+ and O2- ions, which are held together by ionic bonds. Therefore, it is an ionic crystal.

Magnesium Oxide, MgO, Melts at 2,800 ∘\circ∘ C and Is Very Hard

Magnesium Oxide, MgO, Melts at 2,800^$\circ$C and Is Very Hard