Assertion: hafnium | /r/AtLocation | copenhagen
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Source sentences:
text: In 1923, hafnium was identified (using X-ray analysis) as being distinct from zirconium, and recognized as an element in its own right by the Dutch physicist Dirk Coster and Nobel Prize-winning Hungarian chemist György Hevesy, working in Copenhagen, Denmark.
text: In 1923, hafnium was identified (using X-ray analysis) as being distinct from zirconium, and recognized as an element in its own right by the Dutch physicist Dirk Coster and Nobel Prize-winning Hungarian chemist György Hevesy, working in Copenhagen, Denmark.