The names for the chemical elements 104 to 108 have been the subject of a major controversy starting in the 1960s which was only finally resolved in 1997. At issue was the convention that elements are named by their discoverers which led to controversy when multiple groups claimed discovery simultaneously. The three groups which conflicted over elemental naming were an American group at Lawrence Berkeley Laboratory, a Russian group at Joint Institute for Nuclear Research in Dubna, and a German group at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt.

The names preferred by the Americans were

104 - rutherfordium

105 - hahnium

106 - seaborgium

The names preferred by the Russians were

104 - kurchatovium

105 - nielsbohrium

Element 104 was named after Igor Kurchatov who was father of the Russian atomic bomb, and this was one reason the name was objectionable to the Americans. The American name to 106 was objectionable to some because Glenn T. Seaborg was still alive and handing out autographed periodic tables and hence his name could not be used for an element in accordance with the IUPAC rules.

In 1994, the IUPAC proposed the following names

104 - dubnium

105 - joliotium

106 - rutherfordium

107 - bohrium

108 - hahnium

109 - meitnerium

This attempted to resolve the dispute by replacing the name for 104 with a name after the Dubna research center, and to not name 106 after Seaborg.

This was objected to by the American Chemical Society on the grounds that the right of the American group to propose the name for element 106 was not in question and that group should have the right to name the element whatever it wanted to. Indeed, IUPAC decided that the credit for the discovery of element 106 should be shared between Berkeley and Dubna but the Dubna group had not come forward with a name. In addition, given that many American books had already used 104 and 105 for rutherfordium and hahnium, the ACS objected to those names being used for other elements.

Finally in 1997, the following names were agreed to

104 - rutherfordium

105 - dubnium

106 - seaborgium

107 - bohrium

108 - hassium

109 - meitnerium

But in 1999 Glenn T. Seaborg died disputing the name change for #105 and was adamant about it remaining known as hahnium. His reason concerning Dubna in Russia was that he believed that they made a false claim on an element that they got credit for. When the Dubna group finally did release some additional data on the experiment, Seaborg claimed that it was a misreading of the decay pattern of their product. Even then, the Dubna group still refused to remove their claim. Some people in the Berkeley group and some others still refer to it as hahnium.

Also see

• Chemical elements named after people
• Chemical elements named after places
• Systematic element name