Pb

Lead-207

Protons (Z)

82

Neutrons (N)

125

Mass number

207

Half-Life

Stable

Abundance

22.1%

Mass

206.976 u

Mass Excess

-22,452.0 keV

Spin

1/2-

Discovered

1927

Binding energy per nucleon

7,870 keV

Neutron separation energy

6,738 keV

Proton separation energy

7,488 keV

Decay Mode

αMercury-203