atomic number 56

Definitions of atomic number 56

1. noun

   a soft silvery metallic element of the alkali earth group; found in barite
   synonyms: Ba, barium

   types:

   baryta

   any of several compounds of barium

   barium hydroxide

   white poisonous crystals; made by dissolving barium oxide in water

   barium monoxide, barium oxide, barium protoxide

   an oxide of barium; a whitish toxic powder

   barium dioxide, barium peroxide

   a white toxic powder obtained by heating barium oxide in air

   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.