稀有气体又称惰性气体、钝气、高贵气体,是指元素周期表上个18族元素(IUPAC新规定,即原来个0族)。伊拉性质相似,拉常温常压下侪是无色无味个单原子气体,老难进行化学反应。天然存在个稀有气体有六种,即氦(He)、氖(Ne)、氩(Ar)、氪(Kr)、氙(Xe)搭具放射性个氡(Rn)。
稀有气体个特性可以用现代个原子结构理论来解释:伊拉个最外电子层个电子已“满”(就是已经达成八隅体状态),所以伊拉邪气稳定,极少进行化学反应,至今只成功制备出几百种稀有气体化合物。
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