Zirconium-92

Properties and data of the isotope ⁹²Zr.

Contents

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

General data

Name of the isotope:Zirconium-92; Zr-92Symbol:⁹²Zr or 9240ZrMass number A:92 (= number of nucleons)Atomic number Z:40 (= number of protons)Neutrons N:52Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3 (= neutron-proton ratio)Neutron excess (N-Z):12Isotopic mass:91.90503(2) u (atomic weight of Zirconium-92)Nuclide mass:91.8830878 u (calculated nuclear mass without electrons)Mass excess:-88.46399 MeVMass defect:0.85854691199999 u (per nucleus)Nuclear binding energy:799.73129725 MeV (per nucleus)
8.69273149 MeV (average binding energy per nucleon)Separation energy:S_N = 8.63478(9) MeV (first neutron)
S_P = 9.3967(18) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.3057(13) femtometer fmYear of discovery:1924

Parent Nuclides

Direct parent isotopes are: ⁹²Nb, ⁹²Y.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Zirconium Isotopic mixture	91.222 u	100 %
Isotope ⁹⁰Zr	89.90470(2) u	51.45(4) %	stable	0+
Isotope ⁹²Zr	91.90503(2) u	17.15(3) %	stable	0+
Isotope ⁹⁴Zr	93.90631(2) u	17.38(4) %	stable	0+
Isotope ⁹⁶Zr	95.90827(2) u	2.80(2) %	2.0(4) × 10¹⁹ a	0+
Isotope ⁹¹Zr	90.90564021(10) u	11.22(5) %	stable	5/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 52) and isobaric (same nucleon number A = 92) with Zirconium-92. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 52	Isobar A = 92
28	⁸⁰Ni
29	⁸¹Cu
30	⁸²Zn
31	⁸³Ga
32	⁸⁴Ge
33	⁸⁵As	⁹²As
34	⁸⁶Se	⁹²Se
35	⁸⁷Br	⁹²Br
36	⁸⁸Kr	⁹²Kr
37	⁸⁹Rb	⁹²Rb
38	⁹⁰Sr	⁹²Sr
39	⁹¹Y	⁹²Y
40	⁹²Zr	⁹²Zr
41	⁹³Nb	⁹²Nb
42	⁹⁴Mo	⁹²Mo
43	⁹⁵Tc	⁹²Tc
44	⁹⁶Ru	⁹²Ru
45	⁹⁷Rh	⁹²Rh
46	⁹⁸Pd	⁹²Pd
47	⁹⁹Ag	⁹²Ag
48	¹⁰⁰Cd
49	¹⁰¹In
50	¹⁰²Sn
51	¹⁰³Sb