Assertion: protactinium's compound | /r/HasProperty | sensitive
Facets:
value: to air
type: CAUSE
Source sentences:
text: It is isomorphous to uranocene and plutonocene, and they behave chemically identically: all three compounds are insensitive to water or dilute bases but are sensitive to air, reacting quickly to form oxides, and are only slightly soluble in benzene and toluene.