atomic number 12

Definitions of atomic number 12
  1. noun
    a light, malleable, bivalent, silver-white metallic element that burns with brilliant white flame when pure; occurs naturally only in combination with other elements
    synonyms: Mg, magnesium
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    type of:
    metal, metallic element
    any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
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