H Home Background Color: He Li Be Potassium Main Page Black White Gray B C N O F Ne Na Mg Potassium Pictures Page Al Si P S Cl Ar K Ca Potassium Technical Data Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

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-life Fermion, 19p 21n 1.248×109 y Spin 4 Parity -1 Hide Decay Modes Probability Mode Decay Energy Daughter 89.28% β- 1.31107MeV 40Ca 10.72% β+ 482.491keV 40Ar Hide Ultimate Decay Products Yield Nuclide 10.72% 40Ar Atomic Weight 39.963998475 Abundance 0.0117% Mass Excess -33.535205MeV Binding Energy 8.538083MeV Magnetic Moment -1.2981 μ Quadrupole Moment -0.061   Show Element Pictures. Also show decay chains leading to this isotope. Show only decays with probability >0.1%.

Click any isotope in diagram to see its data. Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..