66Dy162.5

Dysprosium (Dy) – element 66

Dysprosium is a chemical element with the symbol Dy and atomic number 66. It is a lanthanide in group 3 (lanthanides), period 6 of the periodic table (f-block), and is a solid at room temperature.

Dysprosium (Dy) has atomic number 66, atomic mass 162.5 u and electron configuration [Xe] 4f10 6s2.

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Dysprosium facts

SymbolDy
Atomic number66
Atomic mass162.5 u (g/mol)
Categorylanthanide
Groupgroup 3 (lanthanides)
Period6
Blockf-block
Phase at 20 °CSolid
Electron configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f10
Noble-gas notation[Xe] 4f10 6s2
Electrons per shell2, 8, 18, 28, 8, 2

Bohr model and shells

Dy

Dysprosium has 66 electrons in 6 shells: 2, 8, 18, 28, 8, 2. Full configuration and noble-gas notation are in the table; work out any element or ion with the electron configuration calculator.

Physical and atomic properties

Melting point1680 K (1406.8 °C)
Boiling point2840 K (2566.8 °C)
Density8.54 g/cm³
Electronegativity (Pauling)1.22
Electron affinity33.96 kJ/mol
Ionization energies573, 1130, 2200 kJ/mol (1st, 2nd, 3rd)
Molar heat capacity27.7 J/(mol·K)
Discovered byLecoq de Boisbaudran

Use the atomic mass in the molar mass calculator for any formula containing Dy.

Position in the periodic table

HydrogenHHeliumHeLithiumLiBerylliumBeBoronBCarbonCNitrogenNOxygenOFluorineFNeonNeSodiumNaMagnesiumMgAluminiumAlSiliconSiPhosphorusPSulfurSChlorineClArgonArPotassiumKCalciumCaScandiumScTitaniumTiVanadiumVChromiumCrManganeseMnIronFeCobaltCoNickelNiCopperCuZincZnGalliumGaGermaniumGeArsenicAsSeleniumSeBromineBrKryptonKrRubidiumRbStrontiumSrYttriumYZirconiumZrNiobiumNbMolybdenumMoTechnetiumTcRutheniumRuRhodiumRhPalladiumPdSilverAgCadmiumCdIndiumInTinSnAntimonySbTelluriumTeIodineIXenonXeCesiumCsBariumBaLanthanumLaCeriumCePraseodymiumPrNeodymiumNdPromethiumPmSamariumSmEuropiumEuGadoliniumGdTerbiumTbDysprosiumDyHolmiumHoErbiumErThuliumTmYtterbiumYbLutetiumLuHafniumHfTantalumTaTungstenWRheniumReOsmiumOsIridiumIrPlatinumPtGoldAuMercuryHgThalliumTlLeadPbBismuthBiPoloniumPoAstatineAtRadonRnFranciumFrRadiumRaActiniumAcThoriumThProtactiniumPaUraniumUNeptuniumNpPlutoniumPuAmericiumAmCuriumCmBerkeliumBkCaliforniumCfEinsteiniumEsFermiumFmMendeleviumMdNobeliumNoLawrenciumLrRutherfordiumRfDubniumDbSeaborgiumSgBohriumBhHassiumHsMeitneriumMtDarmstadtiumDsRoentgeniumRgCoperniciumCnNihoniumNhFleroviumFlMoscoviumMcLivermoriumLvTennessineTsOganessonOg

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Frequently asked questions

What is the atomic mass of dysprosium?

The atomic mass of dysprosium is 162.5 u, so one mole of dysprosium atoms weighs 162.5 g.

What is the electron configuration of dysprosium?

Dysprosium has 66 electrons: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁰, or [Xe] 4f¹⁰ 6s² in noble-gas notation. Electrons per shell: 2, 8, 18, 28, 8, 2.

Is dysprosium a metal?

Yes. Dysprosium is a lanthanide.

Where is dysprosium on the periodic table?

Dysprosium is in group 3 (lanthanides), period 6, in the f-block.

Data: Periodic-Table-JSON (CC BY-SA 3.0); standard atomic weights from IUPAC (abridged). Values in brackets are the mass number of the longest-lived isotope.