Periodic table

Lead-205 (Pb-205)

Identity

Protons
82
Neutrons
123
Mass number
205
Mass
205.0 ± 1.2 u
Mass excess
-23.770 MeV
Spin
5/2-

Stability

Half-life: 1.70 × 10⁷ years

Natural occurrence

Not found in nature

Decays to

Produced by

All isotopes of lead