Pb
Lead-209
Protons (Z)
82
Neutrons (N)
127
Mass number
209
Half-Life
3.24 h
Abundance
---
Mass
208.981 u
Mass Excess
-17,614.6 keV
Spin
9/2+
Discovered
1940
Binding energy per nucleon
7,849 keV
Neutron separation energy
3,937 keV
Proton separation energy
8,153 keV
Decay Mode
- β⁻→Bismuth-209100%
Decay chain
- PbLead-209Z 82 · N 1273.24 h
- β⁻100%
- α100%