Assertion: hafnium | /r/HasProperty | discovered
Facets:
value: in 1923
type: TEMPORAL
value: in copenhagen
type: LOCATION
Source sentences:
text: Hafnium is named after Hafnia, the Latin name for Copenhagen, where it was discovered.
text: Hafnium was discovered by the two in 1923 in Copenhagen, Denmark, validating the original 1869 prediction of Mendeleev.
text: Since rhenium was discovered in 1908, hafnium was the last element with stable isotopes to be discovered.
text: Hafnium is an element that was predicted by Mendeleev (of periodic table fame) before it was actually discovered.
text: Hafnium was the penultimate stable isotope element to be discovered.
text: Hafnium was discovered and first isolated by Dirk Coster and George de Hevesy in 1922.
text: in the current version of the "History" section, it claims that Hafnium was discovered and then predicted by the Bohr theory of the atom.
text: Let’s find out who discovered hafnium and when it was discovered.
text: Hafnium was the next-to-last stable element to be discovered, with Re, identified 2 years later in 1925, being the last.
text: Hafnium was discovered by the two in 1923 in Copenhagen, Denmark, validating the original 1869 prediction of Mendeleev.