🔬 Discovery

Nobelium

Nobelio (No, Z=102)

Date
1966 · confidence medium
Place
Dubna, Russia (JINR)
Credited to
Georgy Flyorov and the JINR team (named after the Nobel Institute in Stockholm)
People
👤 Glenn T. Seaborg1912–1999
Field
Matter & energy

⚠️ Disputed: the sources disagree.

What was discovered

Announced in 1957 in Stockholm, claimed by Berkeley in 1958, but the IUPAC recognised Dubna (1966) as the reliable discoverer in 1992; the name nobelium was kept.

Triple claim: Stockholm, Berkeley and Dubna.

What it led to

  • Start of the 'transfermium wars'
  • Confirmation of the stable +2 oxidation state
  • Creation of the IUPAC/IUPAP Transfermium Working Group

Built on

  • Dubna U-300 cyclotron
  • Curium as a target

Made possible

  • Studies of the aqueous chemistry of the late actinides

Links

Sources✓ verified 2026-09-25