Assertion: metal's compound | /r/HasProperty | formed
Facets:
Source sentences:
text: Pr(IV) compounds can be formed, for example CeO 2 is formed rather than Ce 2 O 3 when cerium reacts with oxygen.
text: This toxic compound is formed when powdered osmium is exposed to air.
text: When compounds in this oxidation state are formed, the outer shell s electrons are lost, yielding a bare zinc ion with the electronic configuration [Ar]3d10.