Platinum-194

Properties and data of the isotope ¹⁹⁴Pt.

Contents

General data

Name of the isotope:Platinum-194; Pt-194Symbol:¹⁹⁴Pt or 19478PtMass number A:194 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:116Isotopic mass:193.962681(6) u (atomic weight of Platinum-194)Nuclide mass:193.9198963 u (calculated nuclear mass without electrons)Mass excess:-34.76242 MeVMass defect:1.652801752 u (per nucleus)Nuclear binding energy:1539.57491518 MeV (per nucleus)
7.93595317 MeV (average binding energy per nucleon)Separation energy:S_N = 8.3518(13) MeV (first neutron)
S_P = 7.5128(12) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.4236(25) femtometer fmYear of discovery:1935

Parent Nuclides

Direct parent isotopes are: ¹⁹⁴Au, ¹⁹⁴Ir.

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 = 116) and isobaric (same nucleon number A = 194) with Platinum-194. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 116	Isobar A = 194
71	¹⁸⁷Lu
72	¹⁸⁸Hf
73	¹⁸⁹Ta	¹⁹⁴Ta
74	¹⁹⁰W	¹⁹⁴W
75	¹⁹¹Re	¹⁹⁴Re
76	¹⁹²Os	¹⁹⁴Os
77	¹⁹³Ir	¹⁹⁴Ir
78	¹⁹⁴Pt	¹⁹⁴Pt
79	¹⁹⁵Au	¹⁹⁴Au
80	¹⁹⁶Hg	¹⁹⁴Hg
81	¹⁹⁷Tl	¹⁹⁴Tl
82	¹⁹⁸Pb	¹⁹⁴Pb
83	¹⁹⁹Bi	¹⁹⁴Bi
84	²⁰⁰Po	¹⁹⁴Po
85	²⁰¹At	¹⁹⁴At
86	²⁰²Rn	¹⁹⁴Rn
87	²⁰³Fr
88	²⁰⁴Ra
89	²⁰⁵Ac