Chemical element · Atomic number 104
Rutherfordium
Rutherfordium in the periodic table: atomic number 104, electron configuration, atomic mass, physical data, oxidation states, media credit and visible sources.
Transition metal
solid
[267.122] u
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Atomic classification
Shell occupancy
Rutherfordium in the Bohr shell model
This shows the electron distribution of the neutral atom in a simplified shell model.
- K · n=1
- 2 electrons
- L · n=2
- 8 electrons
- M · n=3
- 18 electrons
- N · n=4
- 32 electrons
- O · n=5
- 32 electrons
- P · n=6
- 10 electrons
- Q · n=7
- 2 electrons
- Electron configuration
- [Rn]7s2 5f14 6d2
- Electrons per shell
- 2 · 8 · 18 · 32 · 32 · 10 · 2
- Group
- 4
- Period
- 7
- Block
- D
- Element category
- Transition metal
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Physical and chemical properties
- Atomic mass
- [267.122] u
- Standard state
- solid
- Density
- not reported
- Melting point
- not reported
- Boiling point
- not reported
- Electronegativity
- not reported
- First ionisation energy
- not reported
- Oxidation states
- +4
- Discovery
- 1964
Safety and periodic classification
Safety
Safe handling cannot be inferred from Rutherfordium's position in the periodic table alone. Laboratory, classroom and disposal decisions must follow the documentation for the exact material and its safety data sheet.
Position and comparison
Rutherfordium is in period 7, group 4 and the D block. Its direct neighbours by atomic number are Lawrencium and Dubnium. The snapshot does not report a Pauling electronegativity. Periodic trends are compared only through the separately sourced neighbouring values.
Sources and scope
PubChem attributes element data to sources including IUPAC, NIST and IAEA. Quanta stores the referenced snapshot locally and leaves unknown values unavailable.