See also: List of individual Krypton isotopes (and general data sources).
General data
Name of the isotope:Krypton-82; Kr-82Symbol:82Kr or 8236KrMass number A:82 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:46Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.2777777777778 (= neutron-proton ratio)Neutron excess (N-Z):10Isotopic mass:81.913483(6) u (atomic weight of Krypton-82)Nuclide mass:81.8937349 u (calculated nuclear mass without electrons)Mass excess:-80.59007 MeVMass defect:0.766804288 u (per nucleus)Nuclear binding energy:714.27359345 MeV (per nucleus) 8.71065358 MeV (average binding energy per nucleon)Separation energy:SN = 10.9669(11) MeV (first neutron) SP = 9.9037(10) MeV (first proton)Half-life:stableSpin and parity: (nuclear angular momentum)0+Charge radius:4.1919(25) femtometer fmYear of discovery:1920
Comparison of the natural Krypton isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
Atomic Mass ma
Quantity
Half-life
Spin
Krypton Isotopic mixture
83.798 u
100 %
Isotope 78Kr
77.920365(5) u
0.355(3) %
stable
0+
Isotope 80Kr
79.916378(5) u
2.286(10) %
stable
0+
Isotope 82Kr
81.913483(6) u
11.593(31) %
stable
0+
Isotope 83Kr
82.914126517(10) u
11.500(19) %
stable
9/2+
Isotope 84Kr
83.91149773(3) u
56.987(15) %
stable
0+
Isotope 86Kr
85.91061063(3) u
17.279(41) %
stable
0+
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 46) and isobaric (same nucleon number A = 82) with Krypton-82. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
