Platinum-192

Properties and data of the isotope ¹⁹²Pt.

Content

General data

Name of the isotope:Platinum-192; Pt-192Symbol:¹⁹²Pt or 19278PtMass number A:192 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:114Isotopic mass:191.96104(2) u (atomic weight of Platinum-192)Nuclide mass:191.9182553 u (calculated nuclear mass without electrons)Mass excess:-36.29101 MeVMass defect:1.63711292 u (per nucleus)Nuclear binding energy:1524.9608623 MeV (per nucleus)
7.94250449 MeV (average binding energy per nucleon)Separation energy:S_N = 8.6615(29) MeV (first neutron)
S_P = 6.8687(23) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.4169(28) femtometer fmYear of discovery:1935

Parent Nuclides

Direct parent isotopes are: ¹⁹²Au, ¹⁹²Ir.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Platinum Isotopic mixture	195.084 u	100 %
Isotope ¹⁹⁰Pt	189.95993(4) u	0.012(2) %	6.5(3) × 10¹¹ a	0+
Isotope ¹⁹²Pt	191.96104(2) u	0.782(24) %	stable	0+
Isotope ¹⁹⁴Pt	193.962681(6) u	32.864(410) %	stable	0+
Isotope ¹⁹⁵Pt	194.964792(6) u	33.775(240) %	stable	1/2-
Isotope ¹⁹⁶Pt	195.964952(6) u	25.211(340) %	stable	0+
Isotope ¹⁹⁸Pt	197.96789(2) u	7.356(130) %	stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 114) and isobaric (same nucleon number A = 192) with Platinum-192. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 114	Isobar A = 192
70	¹⁸⁴Yb
71	¹⁸⁵Lu
72	¹⁸⁶Hf
73	¹⁸⁷Ta	¹⁹²Ta
74	¹⁸⁸W	¹⁹²W
75	¹⁸⁹Re	¹⁹²Re
76	¹⁹⁰Os	¹⁹²Os
77	¹⁹¹Ir	¹⁹²Ir
78	¹⁹²Pt	¹⁹²Pt
79	¹⁹³Au	¹⁹²Au
80	¹⁹⁴Hg	¹⁹²Hg
81	¹⁹⁵Tl	¹⁹²Tl
82	¹⁹⁶Pb	¹⁹²Pb
83	¹⁹⁷Bi	¹⁹²Bi
84	¹⁹⁸Po	¹⁹²Po
85	¹⁹⁹At	¹⁹²At
86	²⁰⁰Rn
87	²⁰¹Fr
88	²⁰²Ra
89	²⁰³Ac