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 Element Pictures. Show Decay Image Full Size.

Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..