Science Periodic Table - Elements - Dubnium Symbol Db Atomic Number 105 Relative Atomic Mass 12C = 12.0000 262.114 (262Db) Atomic Radius pm 139 (est.) First Ionisation Energy kJ mol-1 640 (est.) Electronegativity n/a Density kg m-3 39000 Molar Volume cm3 n/a Thermal Conductivity W m-1 K-1 n/a Melting Point K n/a Boiling Point K n/a Number of Isotopes 7 Ground State Electron Configuration [Rn]5f146d37s2 Term Symbol 4F3/2 Discovery 260Db and 261Db were initially reported by a group of scientists at Dubna, Russia. Discovery confirmed at Berkeley, USA and Dubna in 1970. Acknowledgment of the discovery is shared between the two groups Name Derived From Named after Dubna Name in Other Languages  Croatian Dubnij  Danish dubnium  Dutch dubnium  Finnish dubnium  French dubnium  German Dubnium  Italian dubnio  Norwegian hahnium  Portuguese dúbnio  Spanish dubnio  Swedish dubnium Peter van der Krogt's Element Multidict - element name translations in over 48 langauges

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