atomic number 56


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Related to atomic number 56: Carmina Burana
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Noun1.atomic number 56 - a soft silvery metallic element of the alkali earth groupatomic number 56 - a soft silvery metallic element of the alkali earth group; found in barite
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.
baryta - any of several compounds of barium
barite, barytes, heavy spar, barium sulphate - a white or colorless mineral (BaSO4); the main source of barium