Assertion: noble gas | /r/HasProperty | gaseous elements
Facets:
Source sentences:
text: Among the characteristics of the most important noble gases are that they are gaseous elements, do not interact with other elements, have a full valence shell, are rare in nature
text: Inert gases, or noble gases, are the gaseous elements in the helium group of the periodic table which are considered chemically nonreactive.
text: Inert gases, or noble gases, are the gaseous elements in the helium group of the periodic table which are considered chemically nonreactive.