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Pb
Lead
43 known isotopes (3 stable,
40 radioactive)
178Pb
Mass
178.003836 u
Abundance —
Half-life 0.12 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
179Pb
Mass
179.002202 u
Abundance —
Half-life 3.5 milliseconds
Spin/Parity (9/2-)
Decay Mode(s) α (100%)
180Pb
Mass
179.997916 u
Abundance —
Half-life 4.1 milliseconds
Spin/Parity 0+
Decay Mode(s) α (100%)
181Pb
Mass
180.996661 u
Abundance —
Half-life 45 milliseconds
Spin/Parity (13/2+)
Decay Mode(s) α (100%)
182Pb
Mass
181.992674 u
Abundance —
Half-life 55 milliseconds
Spin/Parity 0+
Decay Mode(s) α (98%), EC/β⁺ (2%)
183Pb
Mass
182.991863 u
Abundance —
Half-life 535 milliseconds
Spin/Parity (3/2-)
Decay Mode(s) α (90%)
184Pb
Mass
183.988136 u
Abundance —
Half-life 490 milliseconds
Spin/Parity 0+
Decay Mode(s) α (80%), EC/β⁺ (20%)
185Pb
Mass
184.987610 u
Abundance —
Half-life 6.3 seconds
Spin/Parity 3/2-
Decay Mode(s) α (34%)
186Pb
Mass
185.984239 u
Abundance —
Half-life 4.81 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (60%), α (40%)
187Pb
Mass
186.983911 u
Abundance —
Half-life 15.2 seconds
Spin/Parity (3/2-)
Decay Mode(s) EC/β⁺ (90.5%), α (9.5%)
188Pb
Mass
187.980879 u
Abundance —
Half-life 25.5 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (91.5%), α (8.5%)
189Pb
Mass
188.980844 u
Abundance —
Half-life 39 seconds
Spin/Parity (3/2-)
Decay Mode(s) EC/β⁺ (100%), α (0.4%)
190Pb
Mass
189.978082 u
Abundance —
Half-life 71 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (99.6%), α (0.4%)
191Pb
Mass
190.978216 u
Abundance —
Half-life 1.33 m
Spin/Parity (3/2-)
Decay Mode(s) EC/β⁺ (99.987%), α (0.013%)
192Pb
Mass
191.975790 u
Abundance —
Half-life 3.5 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (99.9941%), α (0.0059%)
193Pb
Mass
192.976136 u
Abundance —
Half-life Unknown
Spin/Parity (3/2-)
Decay Mode(s) Unknown
194Pb
Mass
193.974012 u
Abundance —
Half-life 10.7 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%), α (0.0000073%)
195Pb
Mass
194.974516 u
Abundance —
Half-life 15 m
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
196Pb
Mass
195.972788 u
Abundance —
Half-life 37 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%), α (0.00003%)
197Pb
Mass
196.973435 u
Abundance —
Half-life 8.1 m
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
198Pb
Mass
197.972015 u
Abundance —
Half-life 2.4 h
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
199Pb
Mass
198.972913 u
Abundance —
Half-life 90 m
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
200Pb
Mass
199.971819 u
Abundance —
Half-life 21.5 h
Spin/Parity 0+
Decay Mode(s) Electron capture (100%)
201Pb
Mass
200.972870 u
Abundance —
Half-life 9.33 h
Spin/Parity 5/2-
Decay Mode(s) EC/β⁺ (100%)
202Pb
Mass
201.972152 u
Abundance —
Half-life 52.5E+3 years
Spin/Parity 0+
Decay Mode(s) Electron capture (100%), α (1%)
203Pb
Mass
202.973391 u
Abundance —
Half-life 51.92 h
Spin/Parity 5/2-
Decay Mode(s) Electron capture (100%)
204Pb
Mass
203.973044 u
Abundance 1.4000%
Half-life 1.4E+17 years
Spin/Parity 0+
Decay Mode(s) Unknown
205Pb
Mass
204.974482 u
Abundance —
Half-life 1.70E+7 years
Spin/Parity 5/2-
Decay Mode(s) Electron capture (100%)
206Pb Stable
Mass
205.974465 u
Abundance 24.1000%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
207Pb Stable
Mass
206.975897 u
Abundance 22.1000%
Half-life Stable
Spin/Parity 1/2-
Decay Mode(s) —
208Pb Stable
Mass
207.976652 u
Abundance 52.4000%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
209Pb
Mass
208.981090 u
Abundance —
Half-life 3.234 h
Spin/Parity 9/2+
Decay Mode(s) β⁻ (100%)
210Pb
Mass
209.984188 u
Abundance —
Half-life 22.20 years
Spin/Parity 0+
Decay Mode(s) β⁻ (100%), α (0.0000019%)
211Pb
Mass
210.988735 u
Abundance —
Half-life 36.1 m
Spin/Parity 9/2+
Decay Mode(s) β⁻ (100%)
212Pb
Mass
211.991896 u
Abundance —
Half-life 10.622 h
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
213Pb
Mass
212.996561 u
Abundance —
Half-life 10.2 m
Spin/Parity (9/2+)
Decay Mode(s) β⁻ (100%)
214Pb
Mass
213.999804 u
Abundance —
Half-life 27.06 m
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
215Pb
Mass
215.004662 u
Abundance —
Half-life 147 seconds
Spin/Parity (9/2+)
Decay Mode(s) β⁻ (100%)
216Pb
Mass
216.008062 u
Abundance —
Half-life 300 nanoseconds
Spin/Parity 0+
Decay Mode(s) Unknown
217Pb
Mass
217.013162 u
Abundance —
Half-life 19.9 seconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
218Pb
Mass
218.016779 u
Abundance —
Half-life 15 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
219Pb
Mass
219.022136 u
Abundance —
Half-life Unknown
Spin/Parity —
Decay Mode(s) β⁻ (100%)
220Pb
Mass
220.025905 u
Abundance —
Half-life 300 nanoseconds
Spin/Parity 0+
Decay Mode(s) Unknown
Decay mode abbreviations:
β⁻ = Beta minus decay, β⁺ = Beta plus decay, EC = Electron capture, α = Alpha decay
n = Neutron emission, p = Proton emission, SF = Spontaneous fission, IT = Isomeric transition
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