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 Show Ultimate Decay Products 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. Show only decay products of this isotope.

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