HHomeBackground Color:He
LiBePotassium Main PageBlack White GrayBCNOFNe
NaMgPotassium Pictures PageAlSiPSClAr
KCaPotassium Technical DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMcLvTsOg

Isotopes of Potassium (click to see decay chain):
32K  33K  34K  35K  36K  37K  38K  39K  40K  41K  42K  43K  44K  45K  46K  47K  48K  49K  50K  51K  52K  53K  54K  55K 

40K    Half-lifeFermion, 19p 21ntitle icon
1.248×109 ySpin 4 Parity -1

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ProbabilityModeDecay EnergyDaughter
89.28%β-1.31107MeV40Ca
10.72%β+482.491keV40Ar
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YieldNuclide
10.72%40Ar
Atomic Weight39.963998475
Abundance0.0117%
Mass Excess-33.535205MeV
Binding Energy8.538083MeV
Magnetic Moment-1.2981 μ
Quadrupole Moment-0.061
 
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Decay Chain Image

Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..