Talk:Protactinium

Discovery
Pubchem states that " IUPAC who officially named it protactinium and confirmed Hahn and Meitner as co-discoverers". The infobox and text says different. What to do? (and: what means 'co-discoverers': the two together or 'co' with Fajan and Gohring?). -DePiep (talk) 19:41, 6 July 2020 (UTC)
 * With these radioelements there tends to be a conflation between discovering the isotope and the element. In the past the most stable isotope gave the element its name, thus causing the confusion. Hahn and Meitner were the first to discover 231Pa; in the past, "protactinium" also meant this isotope as well as the element. But Fajans and Göhring had discovered 234Pa years before.
 * A similar confusion goes on with radon. The most stable isotope, 222Rn, was discovered in 1900 by Dorn. The fact that Rutherford and Owens had already discovered 220Rn the previous year is generally overlooked. Double sharp (talk) 08:37, 12 July 2020 (UTC)