Assertion: protactinium's isotope | /r/HasProperty | discovered by otto hahn
Facets:
value: in 1918
type: TEMPORAL
Source sentences:
text: Four years later a more stable isotope of protactinium was discovered by Otto Hahn and Lise Meitner.
text: In 1918, another isotope of element number 91 was discovered by German physicists Lise Meitner (1878-1968) and Otto Hahn (1879-1968).
text: However, full credit was never assigned for the discovery until 1917 when a stable isotope was discovered by Otto Hahn and Lise Meitner of Germany and Frederick Soddy and John Cranston of Great Britain.
text: In 1918, another isotope of element number 91 was discovered by German physicists Lise Meitner (1878-1968) and Otto Hahn (1879-1968).
text: In 1918, another isotope of element number 91 was discovered by German physicists Lise Meitner (1878-1968) and Otto Hahn (1879-1968).