Molybdenum-92

Properties and data of the isotope ⁹²Mo.

Content

General data

Name of the isotope:Molybdenum-92; Mo-92Symbol:⁹²Mo or 9242MoMass number A:92 (= number of nucleons)Atomic number Z:42 (= number of protons)Neutrons N:50Isotopic mass:91.906808(5) u (atomic weight of Molybdenum-92)Nuclide mass:91.8837687 u (calculated nuclear mass without electrons)Mass excess:-86.80779 MeVMass defect:0.855089144 u (per nucleus)Nuclear binding energy:796.5104071 MeV (per nucleus)
8.65772182 MeV (average binding energy per nucleon)Separation energy:S_N = 12.671(6) MeV (first neutron)
S_P = 7.4595(29) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.3151(11) femtometer fmYear of discovery:1930

Parent Nuclides

Direct parent isotopes are: ⁹²Tc, ⁹³Ru.

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+

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^92mMo	2760.52(14) keV	190(3) ns	8+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 50) and isobaric (same nucleon number A = 92) with Molybdenum-92. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 50	Isobar A = 92
28	⁷⁸Ni
29	⁷⁹Cu
30	⁸⁰Zn
31	⁸¹Ga
32	⁸²Ge
33	⁸³As	⁹²As
34	⁸⁴Se	⁹²Se
35	⁸⁵Br	⁹²Br
36	⁸⁶Kr	⁹²Kr
37	⁸⁷Rb	⁹²Rb
38	⁸⁸Sr	⁹²Sr
39	⁸⁹Y	⁹²Y
40	⁹⁰Zr	⁹²Zr
41	⁹¹Nb	⁹²Nb
42	⁹²Mo	⁹²Mo
43	⁹³Tc	⁹²Tc
44	⁹⁴Ru	⁹²Ru
45	⁹⁵Rh	⁹²Rh
46	⁹⁶Pd	⁹²Pd
47	⁹⁷Ag	⁹²Ag
48	⁹⁸Cd
49	⁹⁹In
50	¹⁰⁰Sn