Assertion: americium | /r/CapableOf | react with oxygen
Facets:
value: to form the dioxide
type: PURPOSE
Source sentences:
text: Americium reacts with oxygen to form the dioxide AmO 2 , with halogen elements to form compounds such as the tetrafluoride AmF 4 and all the trihalides, and with hydrogen to form the hydride AmH 2+x .