See also: List of individual Platinum isotopes (and general data sources).
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:114Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4615384615385 (= neutron-proton ratio)Neutron excess (N-Z):36Isotopic 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:SN = 8.6615(29) MeV (first neutron) SP = 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
Comparison of the natural Platinum isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
Atomic Mass ma
Quantity
Half-life
Spin
Platinum Isotopic mixture
195.084 u
100 %
Isotope 190Pt
189.95993(4) u
0.00012(2) %
4.83(3) × 1011 years
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.
