NO. 104Transition

Rf

Rutherfordium

Rutherfordium is a superheavy synthetic element with properties similar to hafnium. Its chemistry is studied one atom at a time.

Crystal Structure

Hexagonal close-packed (predicted)

Atomic Mass267 u

Density17 g/cm³

Melting Point2400 K

Boiling Point5800 K

Atomic Radius157 pm

Electronegativity1.3

Ionization Energy580 kJ/mol

Electron Affinity0 kJ/mol

Bonding TypeMetallic

Oxidation States4

Acid/BaseBasic

ReactivityMedium

Electron Configuration

[Rn] 5f14 6d2 7s2

Discovered ByJoint Institute for Nuclear Research

Year1964

Known Isotopes

Rf-267