inert gas

Erialasõnastikud

ID 705165 Viimati muudetud 30.12.2004

Valdkond keemia

väärisgaas eelistatud

inertgaas väldi

inert gas eelistatud

noble gas

rare gas

any of the elements in group 0 of the periodic table. In order of increasing atomic number they are: helium, neon, argon, krypton, xenon, and radon. They are colorless, odorless, tasteless gases and were once believed to be entirely inert, i.e., forming no chemical compounds

Hea teada

väärisgaas eelistatud

Näited

0406 90 - muud juustud: ... 0406 90 04 00 - - - - tükid, pakitud vaakumis või väärisgaasis, koorega vähemalt ühel küljel, netomassiga 1 kg või rohkem, kuid alla 5 kg ja väärtusega tollipiiril üle 430,62 ?, kuid mitte üle 459,39 ? netomassi 100 kg kohta, rasvasisaldusega kuivaine massist 45% või rohkem ja laagerdatud kolm kuud või kauem

inertgaas väldi

inert gas eelistatud

Näited

- Pieces packed in vacuum or in inert gas (4), with rind (2) (a) on at least one side, of a net weight of not less than 1 kg

noble gas

rare gas

ID 718875 Viimati muudetud 30.12.2004

Valdkond keemia

inertne gaas

inert gas

a gas (as nitrogen or carbon dioxide) that is normally chemically inactive esp. in not burning or supporting combustion

inertne gaas

inert gas

Näited

... inert % = % by volume of inert gases in the fuel (i.e. N2, CO2, He, etc.)
When the members of the group were discovered and identified they were thought to be exceedingly rare, as well as chemically inactive, and therefore were called the rare gases or the inert gases. It is now known, however, that several of these elements are quite abundant on Earth and in the rest of the universe, so the designation rare is misleading. Similarly, use of the term inert has the drawback that it often is applied to gases such as nitrogen and carbon dioxide to connote their nonflammability. In chemistry and alchemy, the word noble long has signified the passivity toward oxygen of a group of metals, such as gold and platinum; it applies in the same sense to the group of gases covered here.

Hea teada

The term "inert gas" is also used to designate one of the six gases comprising the extreme right-hand group of the periodic table, i.e., helium, neon, argon, krypton, xenon, and sometimes radon. The term "noble gas" is to be preferred for that other meaning.

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