H Home Background Color: He Li Be Helium Main Page Black White Gray B C N O F Ne Na Mg Helium Pictures Page Al Si P S Cl Ar K Ca Helium 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 Helium (click to see decay chain): 2He  3He  4He  5He  6He  7He  8He  9He  10He

4He     Half-life Boson, 2p 2n 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 4.00260325415 Abundance 99.999863% Mass Excess 2.42491565MeV Binding Energy 7.073915MeV Magnetic Moment 0 μ Quadrupole Moment N/A   Show Element Pictures. 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..