Molybdenum-100

Properties and data of the isotope ¹⁰⁰Mo.

Contents

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:58Isotopic 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:S_N = 8.2942(4) MeV (first neutron)
S_P = 11.147(12) MeV (first proton)Half-life:7.3(4) × 10¹⁸ aDecay constant λ:3.010897658861 × 10^-27 s^-1Specific activity α:1.831520183486 × 10^-5 Bq g^-1
4.950054549963 × 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 T_½ = 7.3(4) × 10¹⁸ a respectively 2.302128 × 10²⁶ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
2 β^-	¹⁰⁰Ru	100 %

Parent Nuclides

Direct parent isotopes are: ¹⁰⁰Tc, ¹⁰⁰Nb.

Occurrence

Comparison of the natural Molybdenum isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	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	94.905839(3) 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 a	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.

Z	Isotone N = 58	Isobar A = 100
32	⁹⁰Ge
33	⁹¹As
34	⁹²Se
35	⁹³Br
36	⁹⁴Kr	¹⁰⁰Kr
37	⁹⁵Rb	¹⁰⁰Rb
38	⁹⁶Sr	¹⁰⁰Sr
39	⁹⁷Y	¹⁰⁰Y
40	⁹⁸Zr	¹⁰⁰Zr
41	⁹⁹Nb	¹⁰⁰Nb
42	¹⁰⁰Mo	¹⁰⁰Mo
43	¹⁰¹Tc	¹⁰⁰Tc
44	¹⁰²Ru	¹⁰⁰Ru
45	¹⁰³Rh	¹⁰⁰Rh
46	¹⁰⁴Pd	¹⁰⁰Pd
47	¹⁰⁵Ag	¹⁰⁰Ag
48	¹⁰⁶Cd	¹⁰⁰Cd
49	¹⁰⁷In	¹⁰⁰In
50	¹⁰⁸Sn	¹⁰⁰Sn
51	¹⁰⁹Sb
52	¹¹⁰Te
53	¹¹¹I
54	¹¹²Xe
55	¹¹³Cs
56	¹¹⁴Ba