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    • Image representing magnesium including Magnesium granules
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 29 August 2019 Size: 280 KB Referencing Hub media

    On the periodic table of elements, magnesium is represented by the symbol Mg. It has an atomic number of 12 because it has 12 protons in its nucleus.

    Magnesium granules image © Leiem/CC BY-SA 4.0

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      Magnesium

      Magnesium is a chemical element – a substance that contains only one type of atom. Its official chemical symbol is Mg, and its atomic number is 12, which means that magnesium has 12 protons in it ...

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