- Symbol: Mg
- Atomic number: 12
- Atomic weight: 24.3050
- Group: 2
- Period: 3
- Color: Silvery white
- Classification: Metallic
- Magnesium is the 8th most abundant element in earth's crust even though not found in it's elemental form.
- Normally magnesium is coated with a layer of oxide, MgO, that protects magnesium from air and water.
- Sea water also contains plenty of magnesium.
- Magnesium: heating in air and burns with a dazzling white flame.
It is important for plant and animal life.
Biology (in humans)
The adult human daily requirement of Magnesium is about 0.3 g day-1
Geology (in the universe)
Chlorophylls porphyrins based upon Magnesium
12 electrons, shell structure is 2.8.2