Assertion: helium | /r/HasProperty | inert
Facets:
value: chemically
type: MANNER
Source sentences:
text: It is inert, because its outermost electron orbital is full with two electrons.
text: It is chemically inert and monatomic in all standard conditions.
text: Helium is used as a protective gas in growing silicon and germanium crystals, in titanium and zirconium production, and in gas chromatography, because it is inert.