104Rf[267]
Rutherfordium
Transition metalsHard, shiny metals that conduct heat and electricity well and often form coloured compounds.
[Rn] 5f¹⁴ 6d² 7s²
- Atomic number
- 104
- Atomic mass
- [267]
- Protons
- 104
- Neutrons
- 163
- Electrons
- 104
- Shells
- 2, 8, 18, 32, 32, 10, 2
- State at 25 °C
- Unknown
- Position
- Group 4, period 7
Proton (+)Neutron (0)Electron (−)
Discovered byTeams at Dubna (1964) and Berkeley (1969)Albert Ghiorso: 12 elements
Both teams claimed it. It was named after Ernest Rutherford, who discovered the nucleus.
Did you know?
- It is the first element after the actinides.
- Its chemistry looks like hafnium's.
Where it's found
- Made only in laboratories, a few atoms at a time
What it's used for
- Scientific research only
Try it
There's no safe home experiment for Rutherfordium. Explore it with the animated atom above instead.