Assertion: noble gas | /r/HasProperty | a group of chemical elements
Facets:
value: with very similar properties
type: OTHER
Source sentences:
text: The noble gases are a group of chemical elements that make up Group 18 on the periodic table.
text: The noble gases are a group of chemical elements with very similar properties: under standard conditions, they are all odorless, colorless, monatomic gases, with a very low chemical reactivity.