1. 12
Mgmagnesio–magnesium
Mass: 24,3247u
[Ne]3s2
Melting point:923 K
Boiling point: 1363K
Density: 1738 kg/m3
Discovery: Joseph Black
. Its common oxidation number is +2. It is an alkaline earth metal.
Magnesium is the fourth most common element in the Earth as a whole
making up 13% of the planet's mass and a large fraction of the planet's
mantle. . Due to magnesium ion's high solubility in water, it is the third
most abundant element dissolved in seawater.