Periodic Table of Elements

Lr - Lawrencium

Lawrencium Menu

Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Lr251251.094148Syn      
Lr252252.095149Syn ~1sαMd248~909.150
 ~1sεNo252~10 
 ~1sSF <1 
Lr253253.095150Syn 1.3sαMd249908.990
 1.3sSF <20 
 1.3sεNo253~14.300
Lr254254.097151Syn 13sαMd250788.750
 13sεNo254225.200
 13sSF <0.1 
Lr255255.097152Syn 22sαMd251858.620
 22sεN0255<303.240
Lr256256.099153Syn 28sαMd252>808.880
 28sεNo256<204.190
 28sSF <0.03 
Lr257257.1154Syn9/2+0.646sαMd253 9.010
 0.646sSF  9.010
Lr258258.102155Syn 3.9sαMd254>958.900
 3.9sεNo258<53.380
 3.9sSF <53.380
Lr259259.103156Syn 6.3sαMd255808.670
 6.3sSF 20 
 6.3sεNo259<0.51.810
Lr260260.106157Syn 180sαMd256758.310
 180sεNo260~152.740
 180sSF <10 
Lr261261.107158Syn 39mSF   
Lr262262.11159Syn 216mSF <102.100
 216mεNo262 2.100
Lr263263.111160Syn      
Lr264 161Syn      
Lr265 162Syn      
NuclidePotential Parent Nuclides
Lr251Db255 (Syn)
Lr252Db256 (Syn)
Lr253Db257 (Syn)
Lr254Db258 (Syn)
Lr255Db259 (Syn)
Lr256Db260 (Syn)
Lr257Db261 (Syn) Rf257 (Syn)
Lr258Db262 (Syn)
Lr259Db263 (Syn) Rf260 (Syn)
Lr260None known
Lr261Rf261 (Syn)
Lr262None known
Lr263None known
Lr264None known
Lr265None known

Key:

  • NN = Number of Neutrons
  • Abun % = Natural Abundance (as a percentage)
  • Syn = Synthetic Nuclide (does not occur in nature)
  • DM = Decay Mode
    α = Alpha emission
    β- = Beta emission
    β- β- = Double beta decay
    β+ = Positron emission
    ε = Electron Capture
    IT = Isomeric Transition
    N = Neutron emission
    P = Proton emission
    SF = Spontaneous Fission
  • DT = Decays To
  • BR % = Branch Ratio (as a percentage)

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References

A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

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