Assertion: borax's boron | /r/HasProperty | isolated
Facets:
value: with potassium metal
type: OTHER
value: by heating boron oxide
type: MANNER
value: by louis-jacques thenard
type: OTHER
Source sentences:
text: Boron was first isolated (1808) by French chemists Joseph-Louis Gay-Lussac and Louis-Jacques Thenard and independently by British chemist Sir Humphry Davy by heating boron oxide (B 2 O 3 ) with potassium metal.