element.nameElectron Panel Modal created by GPPT Lab68Atom NumberErSymbolErbiumNameLanthanideCategory3.0GroupSolidPhaseDiscovered ByCarl Gustaf Mosander1843Year167.260uAtomic Mass28.120kJ/molMolar Heat235.00Atomic Radius3.0Groupg/cm39.066Density6.0Period3141.000°KBoil1802.000°KMelt
Electrons>element.nameElectron shell created by GPPT Lab contact@gppt.tnEr68
Protons and Neutronselement.nameElectron shell created by GPPT Lab contact@gppt.tn68 neutron68 Proton
Erbium is a chemical element in the lanthanide series, with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements on Earth. As such, it is a rare earth element which is associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden, where yttrium, ytterbium, and terbium were discovered.