H Home Background Color: He Li Be Argon Main Page Black White Gray B C N O F Ne Na Mg Argon Pictures Page Al Si P S Cl Ar K Ca Argon 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 Argon (click to see decay chain): 30Ar  31Ar  32Ar  33Ar  34Ar  35Ar  36Ar  37Ar  38Ar  39Ar  40Ar  41Ar  42Ar  43Ar  44Ar  45Ar  46Ar  47Ar  48Ar  49Ar  50Ar  51Ar  52Ar  53Ar

40Ar     Half-life Boson, 18p 22n Stable Spin 0 Parity 1 This isotope is stable and thus has no decay products, so instead we show decay chains that lead down to it. Atomic Weight 39.96238312251 Abundance 99.6003% Mass Excess -35.03989602MeV Binding Energy 8.595259MeV Magnetic Moment 0 μ Quadrupole Moment N/A   Show Isotope Symbols. Show Decay Image Smaller.

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