Assertion: oxygen's effect | /r/HasProperty | to form the blue gas ozone
Facets:
Source sentences:
text: However the effect of ultraviolet light upon oxygen gas is to form the blue gas ozone, O 3 , the second allotrope of oxygen.
text: However the effect of ultraviolet light upon oxygen gas is to form the blue gas ozone, O 3 , the second allotrope of oxygen.