sentence: Barium compounds are quite heavy.
sentences_before: Barium is too reactive as a metal, so it is not found in the earth as a metal. It is found in chemical compounds. Most barium compounds are colorless. The ones that dissolve in water or stomach acid are very toxic. Barium sulfate is well known because it does not dissolve in water or acids.
sentences_after: Barium compounds put out a greenish flame when heated red-hot.
concept_name: barium compound
headings: Barium Properties Chemical compounds
categories: Alkaline earth metals