About   |   More   |   Search
ChemLin Logo

Lead-206

Properties and data of the isotope 206Pb.


Contents

See also: list of Lead isotopes.

 

General data

Name of the isotope:Lead-206; Pb-206Other names:Radium G. UranbleiSymbol:206Pb or 20682PbMass number A:206 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:124Isotopic mass:205.974466(8) u (atomic weight of Lead-206)Nuclide mass:205.9294876 u (calculated nuclear mass without electrons)Mass excess:-23.78477 MeVMass defect:1.741636208 u (per nucleus)Nuclear binding energy:1622.32367793 MeV (per nucleus)
7.87535766 MeV (average binding energy per nucleon)
Separation energy:SN = 8.08666(6) MeV (first neutron)
SP = 7.2537(5) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
0+Charge radius:5.4902(14) femtometer fmYear of discovery:1927

 

Parent Nuclides

Direct parent isotopes are: 206Bi, 210Po, 206Tl.

 

Occurrence

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

 

Atomic Mass maQuantityHalf-lifeSpin
Lead
Isotopic mixture
207.2 u100 %
Isotope 204Pb203.973044(8) u1.4(6) %1.4 × 1017 a0+
Isotope 206Pb205.974466(8) u24.1(30) %stable0+
Isotope 207Pb206.975897(8) u22.1(50) %stable1/2-
Isotope 208Pb207.976653(8) u52.4(70) %stable0+

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
206m1Pb2200.16(4) keV125(2) μs7-
206m2Pb4027.3(3) keV202(3) ns12+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 124) and isobaric (same nucleon number A = 206) with Lead-206. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 124Isobar A = 206
75199Re
76200Os
77201Ir
78202Pt206Pt
79203Au206Au
80204Hg206Hg
81205Tl206Tl
82206Pb206Pb
83207Bi206Bi
84208Po206Po
85209At206At
86210Rn206Rn
87211Fr206Fr
88212Ra206Ra
89213Ac206Ac
90214Th
91215Pa
92216U

 

External data and identifiers

Adopted Levels, Gammas:NuDat 206Pb

 


More Chemistry

isotopes

Social Media

Facebook

LinkedIn

Twitter


Last update: 2021-03-15


© 1996 - 2025 ChemLin