Lead-200
Properties and data of the isotope 200Pb.
See also: list of Lead isotopes.
General data
Name of the isotope:Lead-200; Pb-200Symbol:200Pb or 20082PbMass number A:200 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:118Isotopic mass:199.971818(12) u (atomic weight of Lead-200)Nuclide mass:199.9268396 u (calculated nuclear mass without electrons)Mass excess:-26.25136 MeVMass defect:1.692294712 u (per nucleus)Nuclear binding energy:1576.36237046 MeV (per nucleus)
7.88181185 MeV (average binding energy per nucleon)Separation energy:SN = 9.091(15) MeV (first neutron)
SP = 5.48(3) MeV (first proton)Half-life:21.5(4) hDecay constant λ:8.955389929715 × 10-6 s-1Specific activity α:2.710081387557 × 10+16 Bq g-1
732454.4290697 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.4611(20) femtometer fmYear of discovery:1950
Radioactive Decay
Half-life T½ = 21.5(4) h (hours) respectively 7.7400 × 104 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EE | 200Tl | 100 % | 0.796(12) MeV | |
Parent Nuclides
Direct parent isotopes are: 200Bi, 204Po.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 118) and isobaric (same nucleon number A = 200) with Lead-200. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 118 | Isobar A = 200 |
72 | 190Hf | |
73 | 191Ta | |
74 | 192W | |
75 | 193Re | |
76 | 194Os | 200Os |
77 | 195Ir | 200Ir |
78 | 196Pt | 200Pt |
79 | 197Au | 200Au |
80 | 198Hg | 200Hg |
81 | 199Tl | 200Tl |
82 | 200Pb | 200Pb |
83 | 201Bi | 200Bi |
84 | 202Po | 200Po |
85 | 203At | 200At |
86 | 204Rn | 200Rn |
87 | 205Fr | 200Fr |
88 | 206Ra | |
89 | 207Ac | |
90 | 208Th | |
External data and identifiers
Last update: 2020-10-22
Perma link: https://www.chemlin.org/isotope/lead-200
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