Science Periodic Table - Elements - Indium Symbol In Atomic Number 49 Relative Atomic Mass 12C = 12.0000 114.818 Atomic Radius pm 163 First Ionisation Energy kJ mol-1 558.3 Electronegativity 1.78 Density kg m-3 7310 [298 K] 7032 [m.p.] Molar Volume cm3 15.71 Thermal Conductivity W m-1 K-1 81.6 [300 K] Melting Point K 429.32 Boiling Point K 2353 Number of Isotopes 59 Ground State Electron Configuration [Kr]4d105s25p1 Term Symbol 2P1/2 Discovery Discovered by F. Reich and H. Richter (Freiberg, Germany) in 1863 Name Derived From Named after the indigo line in its atomic spectrum Name in Other Languages  Croatian Indij  Danish indium  Dutch indium  Finnish indium  French indium  German Indium  Italian indio  Norwegian indium  Portuguese índio  Spanish indio  Swedish indium Peter van der Krogt's Element Multidict - element name translations in over 48 langauges

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