H Home Background Color: He Li Be Neon Main Page Black White Gray B C N O F Ne Na Mg Neon Pictures Page Al Si P S Cl Ar K Ca Neon 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 Neon (click to see decay chain): 16Ne  17Ne  18Ne  19Ne  20Ne  21Ne  22Ne  23Ne  24Ne  25Ne  26Ne  27Ne  28Ne  29Ne  30Ne  31Ne  32Ne  33Ne  34Ne

21Ne     Half-life Fermion, 10p 11n Stable Spin 3/2 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 20.993846684 Abundance 0.27% Mass Excess -5.731776MeV Binding Energy 7.971713MeV Magnetic Moment -0.661797 μ Quadrupole Moment 0.103   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..