HHomeBackground Color:He
LiBeRadium Main PageBlack White GrayBCNOFNe
NaMgRadium Pictures PageAlSiPSClAr
KCaRadium Technical DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMcLvTsOg

Isotopes of Radium (click to see decay chain):
202Ra  203Ra  204Ra  205Ra  206Ra  207Ra  208Ra  209Ra  210Ra  211Ra  212Ra  213Ra  214Ra  215Ra  216Ra  217Ra  218Ra  219Ra  220Ra  221Ra  222Ra  223Ra  224Ra  225Ra  226Ra  227Ra  228Ra  229Ra  230Ra  231Ra  232Ra  233Ra  234Ra 

221Ra    Half-lifeFermion, 88p 133ntitle icon
28 sSpin 5/2 Parity 1

Hide Decay Modes
ProbabilityModeDecay EnergyDaughter
100%α6.88039MeV217Rn
1.2×10-10%14CN/A207Pb
Show Ultimate Decay Products
Atomic Weight221.013917338
AbundanceNone
Mass Excess12.963917MeV
Binding Energy7.701134MeV
Magnetic Moment-0.1799 μ
Quadrupole Moment1.978
 
Show Isotope Symbols.
Show only decay products of this isotope.
Show Decay Image Smaller.
Click any isotope in diagram to see its data.
Decay Chain Image

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