Germanium-74
Properties and data of the isotope 74Ge.
See also: list of Germanium isotopes.
General data
Name of the isotope:Germanium-74; Ge-74Symbol:74Ge or 7432GeMass number A:74 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:42Isotopic mass:73.92117776(9) u (atomic weight of Germanium-74)Nuclide mass:73.9036238 u (calculated nuclear mass without electrons)Mass excess:-73.42244 MeVMass defect:0.693149736 u (per nucleus)Nuclear binding energy:645.66482019 MeV (per nucleus)
8.72520027 MeV (average binding energy per nucleon)Separation energy:SN = 10.19624(6) MeV (first neutron)
SP = 11.0121(17) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.0742(11) femtometer fmYear of discovery:1923
Parent Nuclides
Direct parent isotopes are: 74As, 74Ga.
Occurrence
Comparison of the natural Germanium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| Atomic Mass ma | Quantity | Half-life | Spin |
---|
Germanium Isotopic mixture | 72.630 u | 100 % | | |
Isotope 70Ge | 69.924249(6) u | 20.52(19) % | stable | 0+ |
Isotope 72Ge | 71.9220758(5) u | 27.45(15) % | stable | 0+ |
Isotope 73Ge | 72.9234590(4) u | 7.76(8) % | stable | 9/2+ |
Isotope 74Ge | 73.92117776(9) u | 36.52(12) % | stable | 0+ |
Isotope 76Ge | 75.9214027(2) u | 7.75(12) % | 1.926(94) × 1021 a | 0+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 42) and isobaric (same nucleon number A = 74) with Germanium-74. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 42 | Isobar A = 74 |
23 | 65V | |
24 | 66Cr | |
25 | 67Mn | |
26 | 68Fe | 74Fe |
27 | 69Co | 74Co |
28 | 70Ni | 74Ni |
29 | 71Cu | 74Cu |
30 | 72Zn | 74Zn |
31 | 73Ga | 74Ga |
32 | 74Ge | 74Ge |
33 | 75As | 74As |
34 | 76Se | 74Se |
35 | 77Br | 74Br |
36 | 78Kr | 74Kr |
37 | 79Rb | 74Rb |
38 | 80Sr | 74Sr |
39 | 81Y | |
40 | 82Zr | |
41 | 83Nb | |
42 | 84Mo | |
43 | 85Tc | |
44 | 86Ru | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/germanium-74
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