Science Periodic Table - Elements - Californium Symbol Cf Atomic Number 98 Relative Atomic Mass 12C = 12.0000 251.0796 (251Cf) Atomic Radius pm 169 First Ionisation Energy kJ mol-1 608 Electronegativity 1.3 Density kg m-3 n/a Molar Volume cm3 n/a Thermal Conductivity W m-1 K-1 10 [300 K] (est.) Melting Point K 1170 Boiling Point K n/a Number of Isotopes 18 Ground State Electron Configuration [Rn]5f107s2 Term Symbol 5I8 Discovery Produced by S.G. Thompson, K. Street Jr., A. Ghiorso and G.T. Seaborg (Berkeley, USA) in 1950 Name Derived From Named after California, USA Name in Other Languages  Croatian Kalifornij  Danish californium  Dutch californium  Finnish kalifornium  French californium  German Californium  Italian californio  Norwegian californium  Portuguese califórnio  Spanish californio  Swedish californium Peter van der Krogt's Element Multidict - element name translations in over 48 langauges

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