Atomic Properties of Rf
- Atomic Number of Rf
- 104
- Atomic Mass of Rf
- 267.0000 u
- Electron Configuration
- [Rn] 5f14 6d2 7s2
- Electronegativity
- —
- Block
- d-block
- Group
- 4
- Period
- 7
Rutherfordium (Rf) is element 104 on the periodic table. Atomic mass of Rf: 267.0000 u. Rf is in period 7, group 4. Melting point of Rf: 2400.00 K.Density of Rf: 23.20 g/cm³.
Rutherfordium in everyday life and industry
No biological studies possible. Half-lives too short for any biological role.
Discovered by A. Ghiorso, et al in United States, 1969
Name origin: Named in honor of Ernest Rutherford
Radioactive transactinide element. Expected to have similar chemical properties to those displayed by hafnium. Rf-260 was discovered by the Joint Nuclear Research Institute at Dubna (U.S.S.R.) in 1964. Researchers at Berkeley discovered Unq-257 and Unq-258 in 1964.
Rutherfordium has 0 naturally occurring isotopes, plus 1 notable radioactive isotope.
| Isotope | Atomic Mass (u) | Abundance | Half-Life | Decay Mode |
|---|---|---|---|---|
| 267104Rf (Rf-267)Rutherfordium-267 isotope | 267.12179 | — | — | — |
Data source: NIH PubChem (aggregated from IUPAC, NIST)
It has no significant commercial applications.
Made by bombarding californium-249 with beams of carbon-12 and 13, which produced an isotope with half lives of 4+ and 3 sec.
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