any of the elements in Group 18 of the periodic table, including helium, neon, argon, krypton, xenon, and radon, characterized by their inert nature and stable electron configurations
语法信息
有生性状态
无生命
形态构成
复合词
可数
复数形式
noble gases
例子
Helium, a noble gas, is known for its low density and is often used in balloons to make them float.
