惰性氣體, 稀有氣體
any of the unreactive gaseous elements helium, neon, argon, krypton, xenon, and radon
:
• Helium is a noble gas often used to inflate balloons.
氦氣是一種常用於給氣球充氣的惰性氣體。
• Argon is the most abundant noble gas in Earth's atmosphere.
氬是地球大氣中最豐富的惰性氣體。
