Assertion: cerium | /r/HasProperty | reactive
Facets:
value: very
type: DEGREE
Source sentences:
text: cerium is reactive, if hit with a sharp object it will combust and release nitrogen and hydrogenated carbon.
text: Ce is pretty reactive but it can be handled.
text: It is very active, reacting with air, water and most acids and bases.
text: Cerium is highly reactive because it has a 4f1 valence electron.