Assertion: silica | /r/HasProperty | attacked by fluorine
Facets:
value: to form silicon tetrafluoride
type: PURPOSE
value: at room temperature
type: OTHER
value: among the elements
type: OTHER
Source sentences:
text: Among the elements, it is attacked only by fluorine at room temperature to form silicon tetrafluoride: hydrogen and carbon also react, but require temperatures over 1000 °C to do so.