H Home Background Color: He Li Be Oxygen Main Page Black White Gray B C N O F Ne Na Mg Oxygen Pictures Page Al Si P S Cl Ar K Ca Oxygen 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 Oxygen (click to see decay chain): 12O  13O  14O  15O  16O  17O  18O  19O  20O  21O  22O  23O  24O  25O  26O  27O  28O

21O     Half-life Fermion, 8p 13n 3.42 s Spin 5/2 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 100% β- 8.1105MeV 21F Show Ultimate Decay Products Atomic Weight 21.008655886 Abundance None Mass Excess 8.062906MeV Binding Energy 7.389332MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Element Pictures. Show only decay products of this isotope.

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