48Cd112.41

Cadmium (Cd) – element 48

Cadmium is a chemical element with the symbol Cd and atomic number 48. It is a transition metal in group 12, period 5 of the periodic table (d-block), and is a solid at room temperature.

Cadmium (Cd) has atomic number 48, atomic mass 112.41 u and electron configuration [Kr] 4d10 5s2.

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Cadmium facts

SymbolCd
Atomic number48
Atomic mass112.41 u (g/mol)
Categorytransition metal
Groupgroup 12
Period5
Blockd-block
Phase at 20 °CSolid
Electron configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10
Noble-gas notation[Kr] 4d10 5s2
Electrons per shell2, 8, 18, 18, 2

Bohr model and shells

Cd

Cadmium has 48 electrons in 5 shells: 2, 8, 18, 18, 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 point594.22 K (321.1 °C)
Boiling point1040 K (766.9 °C)
Density8.65 g/cm³
Electronegativity (Pauling)1.69
Electron affinity-68 kJ/mol
Ionization energies867.8, 1631.4, 3616 kJ/mol (1st, 2nd, 3rd)
Molar heat capacity26.02 J/(mol·K)
Discovered byKarl Samuel Leberecht Hermann

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

Position in the periodic table

HydrogenHHeliumHeLithiumLiBerylliumBeBoronBCarbonCNitrogenNOxygenOFluorineFNeonNeSodiumNaMagnesiumMgAluminiumAlSiliconSiPhosphorusPSulfurSChlorineClArgonArPotassiumKCalciumCaScandiumScTitaniumTiVanadiumVChromiumCrManganeseMnIronFeCobaltCoNickelNiCopperCuZincZnGalliumGaGermaniumGeArsenicAsSeleniumSeBromineBrKryptonKrRubidiumRbStrontiumSrYttriumYZirconiumZrNiobiumNbMolybdenumMoTechnetiumTcRutheniumRuRhodiumRhPalladiumPdSilverAgCadmiumCdIndiumInTinSnAntimonySbTelluriumTeIodineIXenonXeCesiumCsBariumBaLanthanumLaCeriumCePraseodymiumPrNeodymiumNdPromethiumPmSamariumSmEuropiumEuGadoliniumGdTerbiumTbDysprosiumDyHolmiumHoErbiumErThuliumTmYtterbiumYbLutetiumLuHafniumHfTantalumTaTungstenWRheniumReOsmiumOsIridiumIrPlatinumPtGoldAuMercuryHgThalliumTlLeadPbBismuthBiPoloniumPoAstatineAtRadonRnFranciumFrRadiumRaActiniumAcThoriumThProtactiniumPaUraniumUNeptuniumNpPlutoniumPuAmericiumAmCuriumCmBerkeliumBkCaliforniumCfEinsteiniumEsFermiumFmMendeleviumMdNobeliumNoLawrenciumLrRutherfordiumRfDubniumDbSeaborgiumSgBohriumBhHassiumHsMeitneriumMtDarmstadtiumDsRoentgeniumRgCoperniciumCnNihoniumNhFleroviumFlMoscoviumMcLivermoriumLvTennessineTsOganessonOg

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Frequently asked questions

What is the atomic mass of cadmium?

The atomic mass of cadmium is 112.41 u, so one mole of cadmium atoms weighs 112.41 g.

What is the electron configuration of cadmium?

Cadmium has 48 electrons: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰, or [Kr] 4d¹⁰ 5s² in noble-gas notation. Electrons per shell: 2, 8, 18, 18, 2.

Is cadmium a metal?

Yes. Cadmium is a transition metal.

Where is cadmium on the periodic table?

Cadmium is in group 12, period 5, in the d-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.