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66Dy162.500
Dysprosium
LanthanideDysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime.
Phase: SolidAppearance: silvery white
2, 8, 18, 28, 8, 2
Physical Properties
Atomic Mass162.5001 u
Density8.54 g/cm³
Melting Point1680 K
Boiling Point2840 K
Molar Heat27.7 J/(mol·K)
Period6
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f10
Semantic Config[Xe] 4f10 6s2
Shells2, 8, 18, 28, 8, 2
Electron Affinity33.96 kJ/mol
Electronegativity1.22
Ionization Energies
IE1: 573 kJ/molIE2: 1130 kJ/molIE3: 2200 kJ/molIE4: 3990 kJ/mol
Discovery
Discovered byLecoq de Boisbaudran