Assertion: beryllium | /r/HasProperty | isolated
Facets:
Source sentences:
text: Beryllium was discovered (1798) as the oxide by French chemist Nicolas-Louis Vauquelin in beryl and in emeralds and was isolated (1828) as the metal independently by German chemist Friedrich Wöhler and French chemist Antoine A.B. Bussy by the reduction of its chloride with potassium.