MeSH definition : Elements that constitute group 18 (formerly the zero group) of the periodic table.
They are gases that generally do not react chemically.;
MeSH synonym : elements, group 18; gases, noble; group 18 elements; gases, inert; inert gases; gases, rare; rare gases;
Wikipedia automatic translation : Noble gas;
MeSH annotation : GEN or unspecified; prefer specifics; general or unspecified; prefer specifics;
Wikipedia link : https://en.wikipedia.org/wiki/Noble gas;