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noble gas
noun
- 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
noble gas
/ nō′bəl /
- 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.
- Also called inert gas
- See Periodic Table
Word History and Origins
Origin of noble gas1
Example Sentences
Those reaction-resistant atoms became known as the inert or noble gases, as under ordinary conditions they all existed in the gaseous state.
Many agricultural experiments include a mix of noble gases and air to yield ions of nitrogen and oxygen.
These include plasma generated using noble gases, as well as plasma generated from air.
By measuring the proportion of isotopes in the noble gases, researchers could determine if the mantle had already released its gases into the atmosphere at the time of the diamond’s creation.
Broadley and his colleagues found that the composition of noble gases in these billions-year-old diamonds closely matched the composition found in today’s upper mantle.
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