sentence: Barium reacts with water to make barium hydroxide and hydrogen gas.
sentences_before: Barium is reactive, and if you put pure barium metal in the air, it will react with oxygen. At first it will turn black, then white as barium oxide is formed.
sentences_after: Barium also reacts very fast with acids to make a barium salt and hydrogen. Barium can form barium peroxide if it is burned in air.
concept_name: barium
headings: Barium Properties Chemical properties
categories: Alkaline earth metals