See also: List of individual Molybdenum isotopes (and general data sources).
General data
Name of the isotope:Molybdenum-100; Mo-100Symbol:100Mo or 10042MoMass number A:100 (= number of nucleons)Atomic number Z:42 (= number of protons)Neutrons N:58Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3809523809524 (= neutron-proton ratio)Neutron excess (N-Z):16Isotopic mass:99.907472(7) u (atomic weight of Molybdenum-100)Nuclide mass:99.8844327 u (calculated nuclear mass without electrons)Mass excess:-86.18928 MeVMass defect:0.92374447200001 u (per nucleus)Nuclear binding energy:860.4624332 MeV (per nucleus) 8.60462433 MeV (average binding energy per nucleon)Separation energy:SN = 8.2942(4) MeV (first neutron) SP = 11.147(12) MeV (first proton)Half-life:7.3(4) × 1018 yearsDecay constant λ:3.010897658861 × 10-27 s-1Specific activity α:1.8148842276 × 10-5 Bq g-1 4.905092507135 × 10-16 Ci g-1Spin and parity: (nuclear angular momentum)0+Charge radius:4.4468(25) femtometer fmYear of discovery:1930
Radioactive Decay
Half-life T½ = 7.3(4) × 1018 years respectively 2.302128 × 1026 seconds s.
Comparison of the natural Molybdenum isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
Atomic Mass ma
Quantity
Half-life
Spin
Molybdenum Isotopic mixture
95.95 u
100 %
Isotope 92Mo
91.906808(5) u
14.649(106) %
stable
0+
Isotope 94Mo
93.905085(3) u
9.187(33) %
stable
0+
Isotope 95Mo
94.90583744(13) u
15.873(30) %
stable
5/2+
Isotope 96Mo
95.904676(3) u
16.673(8) %
stable
0+
Isotope 97Mo
96.906018(3) u
9.582(15) %
stable
5/2+
Isotope 98Mo
97.905405(3) u
24.292(80) %
stable
0+
Isotope 100Mo
99.907472(7) u
9.744(65) %
7.3(4) × 1018 years
0+
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 58) and isobaric (same nucleon number A = 100) with Molybdenum-100. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
