Atomic number:104

Group numbers:4

Period:7

Electronic configuration:[Rn] 5f¹⁴ 6d² 7s²

Formal oxidation number:+4

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Relative atomic mass:[267]

 

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.

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