Rutherfordium
Transition Metal
Rutherfordium (Rf) is a chemical element with atomic number 104, classified as a transition metal. At room temperature it is a solid. It was discovered in 1964 by JINR / Lawrence Berkeley Laboratory.
Properties
- Atomic number
- 104
- Atomic mass
- 267 u
- Category
- Transition Metal
- Group
- 4
- Period
- 7
- Block
- d-block
- Electron configuration
- [Rn] 5f¹⁴ 6d² 7s²
- Phase at STP
- Solid
- Density
- 23.2 g/cm³
- Melting point
- 2400 K (2126.8 °C)
- Boiling point
- 5800 K (5526.9 °C)
- Electronegativity
- —
- Atomic radius
- —
- Ionization energy
- 6 eV
- Discovery
- 1964 · JINR / Lawrence Berkeley Laboratory
Common uses
Research only
Did you know?
Named after Ernest Rutherford and first super-heavy element.