H Home Background Color: He Li Be Sodium Main Page Black White Gray B C N O F Ne Na Mg Sodium Pictures Page Al Si P S Cl Ar K Ca Sodium 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 Sodium (click to see decay chain): 18Na  19Na  20Na  21Na  22Na  23Na  24Na  25Na  26Na  27Na  28Na  29Na  30Na  31Na  32Na  33Na  34Na  35Na  36Na  37Na

21Na     Half-life Boson, 11p 10n 22.49 s Spin 3/2 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 100% β+ 2.525416MeV 21Ne Show Ultimate Decay Products Atomic Weight 20.997655206 Abundance None Mass Excess -2.184161MeV Binding Energy 7.765524MeV Magnetic Moment 2.3863 μ Quadrupole Moment 0.05   Show Element Pictures. Also show decay chains leading to this isotope. Show only decays with probability >0.1%.

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