Assertion: hydrogen | /r/HasAspect | three occurring isotopes
Facets:
value: naturally
type: MANNER
Source sentences:
text: Hydrogen has three naturally occurring isotopes, denoted 1
text: Hydrogen ( 1 H) has three naturally occurring isotopes, sometimes denoted 1H, 2H, and 3H.
text: Hydrogen ( 1 H) has three naturally occurring isotopes, sometimes denoted 1H, 2H, and 3H.