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104Rf267.000
Rutherfordium
Transition MetalRutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 267Rf, has a half-life of approximately 1.3 hours. In the periodic table of the elements, it is a d - block element and the second of the fourth - row transition elements.
Phase: Solid
2, 8, 18, 32, 32, 10, 2
Physical Properties
Atomic Mass267 u
Density23.2 g/cm³
Melting Point2400 K
Boiling Point5800 K
Period7
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d2
Semantic Config[Rn] 5f14 6d2 7s2
Shells2, 8, 18, 32, 32, 10, 2
Ionization Energies
IE1: 580 kJ/mol
Discovery
Discovered byJoint Institute for Nuclear Research