Assertion: helium | /r/CapableOf | diffuse that of air
Facets:
value: for these reasons
type: CAUSE
value: through solids
type: MANNER
value: at a rate
type: MANNER
Source sentences:
text: For these reasons and the small size of helium monatomic molecules, helium diffuses through solids at a rate three times that of air and around 65% that of hydrogen.