Tl

Thallium-207

Protons (Z)

81

Neutrons (N)

126

Mass number

207

Half-Life

4.77 m

Abundance

---

Mass

206.977 u

Mass Excess

-21,034.0 keV

Spin

1/2+

Discovered

1908

Binding energy per nucleon

7,867 keV

Neutron separation energy

6,852 keV

Proton separation energy

7,377 keV

Decay Mode

β⁻Lead-207100%

Decay chain

Thallium-207Z 81 · N 1264.77 m
β⁻100%