The molar mass of magnesium is 24.305 grams per mole. This means that, given a sample of magnesium where the number of atoms in the sample is equivalent to Avogadro's constant, the mass of the sample is exactly 24.305 grams.
Magnesium is the 12th element in the periodic table and is classified as an alkaline earth metal. It is one of the eight most abundant elements in the Earth's crust and one of the nine most abundant elements in the universe overall. Following iron, oxygen and silicon, magnesium is the fourth-most abundant element on Earth. Its chemical symbol is Mg.