Rutherfordium, 104 General properties Pronunciation Template:Infobox element/pronunciation Standard atomic weight (A r, standard ) Template:Infobox element/standard atomic weight Mass number Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)Rutherfordium in the periodic table Template:Infobox element/periodic table Atomic number (Z ) 104 Group Template:Infobox element/group Period period 7 Block d-block Element category Template:Infobox element/category format Electron configuration [Rn ] 5f14 6d2 7s2 [1] [2] Electrons per shell
2, 8, 18, 32, 32, 10, 2 Physical properties Phase at STP solid (predicted) [1] [2] Melting point 2400 K (2100 °C, 3800 °F) (predicted) [1] [2] Boiling point 5800 K (5500 °C, 9900 °F) (predicted) [1] [2] Density (near r.t. ) 23.2 g/cm3 (predicted) [1] [2] [3] Atomic properties Oxidation states Template:Infobox element/symbol-to-oxidation-state [[Ionization energy|Template:Engvar energies]] 1st: 580 kJ/mol 2nd: 1390 kJ/mol 3rd: 2300 kJ/mol (more ) (all but first estimated) [2] Atomic radius empirical: 150 pm (estimated) [2] Covalent radius 157 pm (estimated) [1] Template:Infobox element/spectral lines Other properties Crystal structure Template:Infobox element/crystal structure (predicted) [4] CAS Number 53850-36-5 History Naming after Ernest Rutherford Discovery Joint Institute for Nuclear Research and Lawrence Berkeley National Laboratory (1964, 1969) Main isotopes of rutherfordium Template:Infobox element/isotopes table | references
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↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Chemical Data. Rutherfordium - Rf , Royal Chemical Society↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media . ISBN 1-4020-3555-1 ↑ 3.0 3.1 Fricke, Burkhard (1975). "Superheavy elements: a prediction of their chemical and physical properties" . Recent Impact of Physics on Inorganic Chemistry . 21 : 89–144. doi :10.1007/BFb0116498 . Retrieved 4 October 2013 . ↑ Östlin, A.; Vitos, L. (2011). "First-principles calculation of the structural stability of 6d transition metals". Physical Review B . 84 (11). Bibcode :2011PhRvB..84k3104O . doi :10.1103/PhysRevB.84.113104 .