Gaseous helium is inert, colorless, odorless, non corrosive, and nonflammable. Helium is the lightest rare gas. Helium is a monatomic chemically inert gas. It will not react with other elements or compounds under ordinary conditions.

• 气态氦极不活泼，无色，无嗅，无腐蚀性，不可燃。氦是最轻的稀有气体。它是单原子惰性气体。一般情况下不同其它元素或化合物反应。