Pb

Lead-199

Protons (Z)

82

Neutrons (N)

117

Mass number

199

Half-Life

1.5 h

Abundance

---

Mass

198.973 u

Mass Excess

-25,232.0 keV

Spin

3/2-

Discovered

1950

Binding energy per nucleon

7,876 keV

Neutron separation energy

7,236 keV

Proton separation energy

4,992 keV

Decay Mode

β⁺Thallium-199100%

Decay chain

Lead-199Z 82 · N 1171.5 h
β⁺100%
β⁺100%