atomic number 56

Thesaurus

Noun

1.atomic number 56 - a soft silvery metallic element of the alkali earth group; found in bariteBa, bariummetal, 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 bariumbarite, barytes, heavy spar, barium sulphate - a white or colorless mineral (BaSO4); the main source of barium