atomic number 56
Also found in: Thesaurus.
Related to atomic number 56: Carmina Burana
Switch to new thesaurus
|Noun||1.||atomic 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