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The basic animated[1] structure of magnesium, symbol Mg, an atom comprised of 12 protons, 12 neutrons, and 12 electrons.

In chemistry, magnesium (LH:12), symbol Mg, the 12th element (Z:12) of the periodic table, is an atom, with a mass of 23.32 amu, comprised of 12 protons, 12 neutrons, and 12 electrons; with an electron configuration of: [Ne] 3s2.


See main: Elemental composition of humans; Thims periodic table

The following is an early estimate of the percent magnesium in humans:

“The human body contains carbon 13.5%, hydrogen 9.1%, oxygen 72%, nitrogen 2.5%, phosphorus 1.15%, sodium 0.1 %, calcium 1.3%, magnesium 0.001%, iron 0.01%, and traces of silicon and fluorine.”
— Carl Kelsey (1916), The Physical Basis of Society (pg. 7) [2]

Presently, it is known that in humans, sodium is the 11th most dominant element, by mass composition (0.029% mass), of the 26-elements in the standard human molecular formula.[3]

End matter


  1. Magnesium –
  2. Kelsey, Carl. (1916). The Physical Basis of Society (pg. 7). D. Appleton and Company.
  3. Thims, Libb. (2008). The Human Molecule (GB) (Amz) (Iss) (elemental composition table, pgs. 52-55). LuLu.

External links

Theta Delta ics T2.jpg