Noble gas
01
貴ガス, 不活性ガス
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
例
Helium, a noble gas, is known for its low density and is often used in balloons to make them float.
ヘリウムは貴ガスで、その低密度で知られており、風船を浮かせるためによく使われます。
