Atomic symbol: Rf
Atomic number: 104
Atomic mass: 267

Appearance: Solid at 25°C

Group: 4
Period: 7
Series: Transition metals
Block: d
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 5f¹⁴ 6d² 7s²

Synthetic, highly radioactive metal.

The first superheavy, transactinide metal to be discovered.

Fun Fact! As a synthetic metal, rutherfordium can be produced from several different elements, including plutonium with neon and californium with carbon.