Periodic Table of Elements

Mg - Magnesium

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Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Mg2020.01898Syn0+95msε + PNe19>=38.530
 95msεNa20 10.730
Mg2121.01179Syn5/2+, 3/2+122msε + PNe2029.310.665
 122msεNa21 13.096
Mg2221.999610Syn0+3.857sεNa22 4.786
Mg2322.994111Syn3/2+11.317sεNa23 4.057
Mg2423.9851278.990+Stable 
Mg2524.98581310.5/2+Stable 
Mg2625.98261411.010+Stable 
Mg2726.984315Syn1/2+9.458mβ-Al27 2.610
Mg2827.983916Syn0+20.91hβ-Al28 1.832
Mg2928.988617Syn3/2+1.3sβ-Al29 7.550
Mg3029.990518Syn0+335msβ-Al30 6.990
Mg3130.996519Syn 230msβ- + NAl301.74.590
 230msβ-Al31 11.740
Mg3231.99920Syn0+120msβ- + NAl312.46.090
 120msβ-Al32 10.270
Mg3333.00621Syn 90msβ- + NAl32178.190
 90msβ-Al33 13.710
Mg3434.00922Syn0+20msβ-Al34 11.300
 20msβ- + NAl33 8.900
Mg3535.01723Syn >200ns    
Mg3636.02224Syn0+>200ns    
Mg3737.03125Syn      
NuclidePotential Parent Nuclides
Mg20None known
Mg21Si22 (Syn)
Mg22Al22 (Syn)
Mg23Al23 (Syn) Si24 (Syn)
Mg24Al24 (Syn) Al24m (Syn) Na24 (Syn) Na24m (Syn) Si25 (Syn)
Mg25Al25 (Syn) Na25 (Syn)
Mg26Al26 (Syn) Al26m (Syn) Na26 (Syn) Na27 (Syn)
Mg27Na27 (Syn) Na28 (Syn)
Mg28Na28 (Syn) Na29m (Syn)
Mg29Na29 (Syn) Na30 (Syn)
Mg30Na30 (Syn) Na31 (Syn)
Mg31Na31 (Syn) Na32 (Syn)
Mg32Na32 (Syn) Na33 (Syn)
Mg33Na33 (Syn) Na34 (Syn)
Mg34Na34 (Syn) Na35 (Syn)
Mg35Na35 (Syn)
Mg36None known
Mg37None 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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