Assertion: hydrogen | /r/HasAspect | denoted 1h
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
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.