Tellurium-126
Properties and data of the isotope 126Te.
See also: list of Tellurium isotopes.
General data
Name of the isotope:Tellurium-126; Te-126Symbol:126Te or 12652TeMass number A:126 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:74Isotopic mass:125.90331(1) u (atomic weight of Tellurium-126)Nuclide mass:125.8747856 u (calculated nuclear mass without electrons)Mass excess:-90.06615 MeVMass defect:1.144795448 u (per nucleus)Nuclear binding energy:1066.37009104 MeV (per nucleus)
8.46325469 MeV (average binding energy per nucleon)Separation energy:SN = 9.11369(8) MeV (first neutron)
SP = 9.0980(21) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.7266(32) femtometer fmYear of discovery:1924
Parent Nuclides
Direct parent isotopes are: 126I, 126Sb.
Occurrence
Comparison of the natural Tellurium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| Atomic Mass ma | Quantity | Half-life | Spin |
---|
Tellurium Isotopic mixture | 127.60 u | 100 % | | |
Isotope 120Te | 119.90406(2) u | 0.09(1) % | stable | 0+ |
Isotope 122Te | 121.90304(1) u | 2.55(12) % | stable | 0+ |
Isotope 123Te | 122.90427(1) u | 0.89(3) % | 9.2 × 1016 a | 1/2+ |
Isotope 124Te | 123.90282(1) u | 4.74(14) % | stable | 0+ |
Isotope 125Te | 124.9044312(15) u | 7.07(15) % | stable | 1/2+ |
Isotope 126Te | 125.90331(1) u | 18.84(25) % | stable | 0+ |
Isotope 128Te | 127.904461(6) u | 31.74(8) % | 7.7(4) × 1024 a | 0+ |
Isotope 130Te | 129.90622275(8) u | 34.08(62) % | 0.79 × 1021 a | 0+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 74) and isobaric (same nucleon number A = 126) with Tellurium-126. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 74 | Isobar A = 126 |
41 | 115Nb | |
42 | 116Mo | |
43 | 117Tc | |
44 | 118Ru | |
45 | 119Rh | 126Rh |
46 | 120Pd | 126Pd |
47 | 121Ag | 126Ag |
48 | 122Cd | 126Cd |
49 | 123In | 126In |
50 | 124Sn | 126Sn |
51 | 125Sb | 126Sb |
52 | 126Te | 126Te |
53 | 127I | 126I |
54 | 128Xe | 126Xe |
55 | 129Cs | 126Cs |
56 | 130Ba | 126Ba |
57 | 131La | 126La |
58 | 132Ce | 126Ce |
59 | 133Pr | 126Pr |
60 | 134Nd | 126Nd |
61 | 135Pm | 126Pm |
62 | 136Sm | |
63 | 137Eu | |
64 | 138Gd | |
65 | 139Tb | |
66 | 140Dy | |
67 | 141Ho | |
External data and identifiers
Last update: 2020-10-18
Perma link: https://www.chemlin.org/isotope/tellurium-126
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