noble gas

noun

, Chemistry.

1. any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon.

noble gas

noun

1. another name for inert gas

noble gas

/ nō′bəl /

1. Any of the six gases helium, neon, argon, krypton, xenon, and radon. Because the outermost electron shell of atoms of these gases is full, they do not react chemically with other substances except under certain special conditions.
2. Also called inert gas
3. See Periodic Table

Word History and Origins

Origin of noble gas¹

First recorded in 1900–05