
1) Helium or krypton 2) Molecular nitrogen 3) Neon or helium 4) Neon or xenon 5) Noble thing 6) Xenon or neon
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https://www.crosswordclues.com/clue/inert-gas

inert gases; noble gas; noble gases. Any of the elements of Group 18, which includes helium, neon, argon, krypton, xenon, radon, and element 118. These elements are referred to as 'inert' or 'noble' because they do not easily form compounds with other elements.
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http://antoine.frostburg.edu/chem/senese/101/glossary/i.shtml

An inert gas is a gas which does not undergo chemical reactions under a set of given conditions. The noble gases and nitrogen often do not react with many substances. Inert gases are used generally to avoid unwanted chemical reactions degrading a sample. These undesirable chemical reactions are often oxidation and hydrolysis reactions with the oxy...
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http://en.wikipedia.org/wiki/Inert_gas

A gas that does not react with other substances, e.g. argon or krypton. Sealed between two sheets of glazing, an inert gas decreases the U-value (increase the R-value) of windows. Related category • WINDOWS TOPICS
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http://www.daviddarling.info/encyclopedia/I/AE_inert_gas.html

A xenon atom. Notice that the outer electron shell has 8 electrons and is therefore full. This makes xenon extremely unreactive. Credit: The Open Door Website Any of a family of (almost) completely unreactive, colorless, and odorless elements. The inert gases include (in order of increasing atom...
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http://www.daviddarling.info/encyclopedia/I/inert_gas.html

A gas that does not react with other substances; e.g. argon or krypton; sealed between two sheets of glazing to decrease the U-value (increase the R-Value) of windows.
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http://www.electromn.com/glossary/i.htm

Translations for „Inert gas“ Become a Premium Member today! Inert substances (inert = inactive, uninvolved) are substances that are inert and do not participate in certain chemical processes because they do not contain oxygen. These are almost all gases (noble gases), except the very reactive oxygen. In viticulture, for example, ...
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https://glossary.wein.plus/inert-gas

A gas that will not support combustion or sustain any chemical reaction; e.g., argon or helium.
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/

A gas which does not normally combine chemically with other elements. See also: Halogen.
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https://www.encyclo.co.uk/local/20687

Any gas that can be used in the laboratory to protect sensitive substances from reacting with the oxygen of the air. Pure nitrogen can be used in principle, but a noble gas such as argon is usually preferred
Found on
https://www.encyclo.co.uk/local/21221

A gas that does not react with other substances; e.g. argon or krypton; sealed between two sheets of glazing to decrease the U-value (increase the R-Value) of windows.
Found on
https://www.encyclo.co.uk/local/22819

A gas that will not support combustion or sustain any chemical reaction; e.g., argon or helium.
Found on
https://www.metaltek.com/resources/glossary/
No exact match found.