Krypton-80

Properties and data of the isotope ⁸⁰Kr.

Contents

See also: List of individual Krypton isotopes (and general data sources).

General data

Name of the isotope:Krypton-80; Kr-80Symbol:⁸⁰Kr or 8036KrMass number A:80 (= number of nucleons)Atomic number Z:36 (= number of protons)Neutrons N:44Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.2222222222222 (= neutron-proton ratio)Neutron excess (N-Z):8Isotopic mass:79.916378(5) u (atomic weight of Krypton-80)Nuclide mass:79.8966299 u (calculated nuclear mass without electrons)Mass excess:-77.89339 MeVMass defect:0.74657945600001 u (per nucleus)Nuclear binding energy:695.43428379 MeV (per nucleus)
8.69292855 MeV (average binding energy per nucleon)Separation energy:S_N = 11.522(4) MeV (first neutron)
S_P = 9.1143(12) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.1970(28) femtometer fmYear of discovery:1920

Parent Nuclides

Direct parent isotopes are: ⁸⁰Rb, ⁸⁰Br.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Krypton Isotopic mixture	83.798 u	100 %
Isotope ⁸⁰Kr	79.916378(5) u	2.286(10) %	stable	0+
Isotope ⁸²Kr	81.913483(6) u	11.593(31) %	stable	0+
Isotope ⁸⁴Kr	83.91149773(3) u	56.987(15) %	stable	0+
Isotope ⁸⁶Kr	85.91061063(3) u	17.279(41) %	stable	0+
Isotope ⁷⁸Kr	77.920365(5) u	0.355(3) %	stable	0+
Isotope ⁸³Kr	82.914126517(10) u	11.500(19) %	stable	9/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 80) with Krypton-80. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 44	Isobar A = 80
22	⁶⁶Ti
23	⁶⁷V
24	⁶⁸Cr
25	⁶⁹Mn
26	⁷⁰Fe
27	⁷¹Co
28	⁷²Ni	⁸⁰Ni
29	⁷³Cu	⁸⁰Cu
30	⁷⁴Zn	⁸⁰Zn
31	⁷⁵Ga	⁸⁰Ga
32	⁷⁶Ge	⁸⁰Ge
33	⁷⁷As	⁸⁰As
34	⁷⁸Se	⁸⁰Se
35	⁷⁹Br	⁸⁰Br
36	⁸⁰Kr	⁸⁰Kr
37	⁸¹Rb	⁸⁰Rb
38	⁸²Sr	⁸⁰Sr
39	⁸³Y	⁸⁰Y
40	⁸⁴Zr	⁸⁰Zr
41	⁸⁵Nb
42	⁸⁶Mo
43	⁸⁷Tc
44	⁸⁸Ru
45	⁸⁹Rh
46	⁹⁰Pd