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惰性气体又称稀有气体,包括氦、氖、氩、氪、氙和氡六种。除氡以外,空气中都有,可由液态空气分馏而得。氦可用于填充气球、温度计、电子管等。氦和氧混合制成的人造空气,可用来治疗呼吸道疾病;填充潜水服供潜水员呼吸,因为氦在血液中的溶解度比氮小得
Inert gases, also known as rare gases, including helium, neon, argon, krypton, xenon and radon six. In addition to radon, the air can be obtained from the liquid air fractionation. Helium can be used to fill balloons, thermometers, tubes, and more. Man-made air, made of helium and oxygen, can be used to treat respiratory illnesses. Fill wetsuits for the diver to breathe because helium is less soluble in the blood than nitrogen