Assertion: hydrocarbon's carbon atom | /r/HasProperty | linked by double bond
Facets:
Source sentences:
text: Olefin, also called alkene, compound made up of hydrogen and carbon that contains one or more pairs of carbon atoms linked by a double bond.
text: Like ethylene, it belongs to the “lower olefins,” a class of hydrocarbons whose molecules contain a single pair of carbon atoms linked by a double bond.