Assertion: metal | /r/CapableOf | react with oxygen
Facets:
value: at higher temperatures
type: TEMPORAL
value: to form oxides
type: PURPOSE
value: in the air
type: LOCATION
Source sentences:
text: Metals are usually inclined to form cations through electron loss, reacting with oxygen in the air to form oxides over changing timescales (iron rusts over years, while potassium burns in seconds).
text: At higher temperatures, all three metals react with oxygen, nitrogen, carbon, boron, sulfur, and silicon.