Question

magnesium has a chemical symbol of (mg) is listed as a compound element solution atom

Explanation:

An element is a pure substance made of only one type of atom. Magnesium (Mg) is a single - type of atom and is listed as an element in the periodic table. A compound is made of two or more different elements chemically combined. A solution is a homogeneous mixture. An atom is the smallest unit of an element, but when we refer to magnesium in the context of the periodic table listing, we call it an element.

Answer:

B. element