Roentgenium
Roentgenio (Rg, Z=111)
- Date
- 1994 · confidence high
- Place
- GSI, Darmstadt, Germany
- Credited to
- Sigurd Hofmann and the GSI team
- People
- 👤 Sigurd Hofmann1944–2022
- Field
- Matter & energy
⚠️ Disputed: the sources disagree.
What was discovered
Three atoms of Rg-272 obtained in December 1994 by fusing nickel-64 with bismuth-209; named after Wilhelm Röntgen in 2004.
Required further confirmation in 2002 before acceptance.
What it led to
- Gold and silver homologue in group 11
- Relativistic chemistry predictions for superheavy coinage metals
- Tribute to the discovery of X-rays
Built on
- SHIP
- Cold fusion
Made possible
- Confirmation at RIKEN (2003)