Relative atomic mass: [267]

English: Rutherfordium
French: Rutherfordium
Croatian: Rutherfordij
German: Rutherfordium
Italian: Rutherfordio
Spanish: Rutherfordio

Atomic number: 104
Group numbers: 4
Period: 7
Standard state (20 oC): solid

Discovery: 1964 Albert Ghiorso & Berkely Lab. (US), Georgy Nikolaevich Flerov & JINR Dubna (RU)
Rutherfordium was discovered by workers at the Nuclear Institute at Dubna (RU) and by workers at the University of California, Berkeley (US) in 1964. Name in honour of Lord Rutherford, the physicist and chemist from New Zealand. It is a synthetic radioactive metal. Rutherfordium was made by bombarding californium-249 with beams of carbon-12 and 13. Six isotopes of rutherfordium have so far been identified. Rutherfordium-261, the longest-lived, has a half-life of 62 seconds.
Electronic configuration: [Rn] 5f14 6d2 7s2
Formal oxidation number: +4
Atomic radius: - pm

Electronegativities: -
Thermal conductivity: - W/(m K)
Electrical resistivity (20 oC): - microOhm cm

Melting point: - oC
Boiling point: - oC

Heat of fusion: - kJ/mol
Heat of vaporization: - kJ/mol
Heat of atomization: - kJ/mol

103Lr <= 104Rf => 105Db

ASCII Periodic Table of the Elements
6 Jan. 2020
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