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.
Experiment with the elements
Rutherfordium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.