ChemGlobe

Rutherfordium

Metal radioactivesynthetic
Symbol: Rf
Atomic number: 104
Atomic mass: (261.1089)
Group: Transition Metal
CAS-number: 53850-36-5

Deutsch
Français
Español
Physical data
Isotopes
Other info
Navigation
Hf
Hafnium
Lr Lawrencium To Periodic Table DubniumDb
disabled arrow

Go to element

Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 32, 32, 10, 2
Orbitals: [Rn] 5f14 6d2 7s2
Electronegativity: --, --
1. Ionization potential: -- eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 4
Electrical conductivity: --
Melting point: -- °C
Boiling point: -- °C
Specific heat: -- J/gK
Heat of fusion: -- kJ/mol
Heat of vaporization: -- kJ/mol
Thermal conductivity: 0.23 W/cmK
Atomic radius: -- Å
Ionic radius: -- Å
Covalent radius: -- Å
Atomic volume: -- cm³/mol
Density (293 K): -- g/cm³
Crystal structure: --

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
257Rf 0 257.103 0 4.7s α, EC, SF View
258Rf 0 258.103 0 12ms SF View
259Rf 0 259.106 0 3.4s α, SF View
261Rf 0 261.109 0 1.1m α View

Other info

Name origin:Named in honor of Ernest Rutherford.
Description:Synthetic radioactive metal.
Discovered by:A. Ghiorso, et al
Year:1969
Place:United States
Sources:Made by bombarding californium-249 with beams of carbon-12 and 13, which produced an isotope with half lives of 4+ and 3 sec.
Use(s):It has no significant commercial applications.