Platinum-190
Properties and data of the isotope 190Pt.
See also: List of individual Platinum isotopes (and general data sources).
General data
Name of the isotope:Platinum-190; Pt-190Symbol:190Pt or 19078PtMass number A:190 (= number of nucleons)Atomic number Z:78 (= number of protons)Neutrons N:112Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4358974358974 (= neutron-proton ratio)Neutron excess (N-Z):34Isotopic mass:189.95993(4) u (atomic weight of Platinum-190)Nuclide mass:189.9171453 u (calculated nuclear mass without electrons)Mass excess:-37.32496 MeVMass defect:1.620893088 u (per nucleus)Nuclear binding energy:1509.85218611 MeV (per nucleus)
7.94659045 MeV (average binding energy per nucleon)Separation energy:SN = 8.908(10) MeV (first neutron)
SP = 6.146(13) MeV (first proton)Half-life:6.5(3) × 1011 aDecay constant λ:3.381469678413 × 10-20 s-1Specific activity α:107.74437416408 Bq g-1
2.912010112542 × 10-9 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.4108(30) femtometer fmYear of discovery:1949
Radioactive Decay
Half-life T½ = 6.5(3) × 1011 a respectively 2.04984 × 1019 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| α | 186Os | 100 % | 3.2686(6) MeV | |
Parent Nuclides
Direct parent isotope is: 190Au.
Occurrence
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 | 0.012(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 = 112) and isobaric (same nucleon number A = 190) with Platinum-190. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 112 | Isobar A = 190 |
|---|
| 70 | 182Yb | |
| 71 | 183Lu | |
| 72 | 184Hf | 190Hf |
| 73 | 185Ta | 190Ta |
| 74 | 186W | 190W |
| 75 | 187Re | 190Re |
| 76 | 188Os | 190Os |
| 77 | 189Ir | 190Ir |
| 78 | 190Pt | 190Pt |
| 79 | 191Au | 190Au |
| 80 | 192Hg | 190Hg |
| 81 | 193Tl | 190Tl |
| 82 | 194Pb | 190Pb |
| 83 | 195Bi | 190Bi |
| 84 | 196Po | 190Po |
| 85 | 197At | 190At |
| 86 | 198Rn | |
| 87 | 199Fr | |
External data and identifiers
Last update: 2020-10-21
Perma link: https://www.chemlin.org/isotope/platinum-190
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