Tl

Thallium-204

Protons (Z)

81

Neutrons (N)

123

Mass number

204

Half-Life

3.78 y

Abundance

---

Mass

203.974 u

Mass Excess

-24,346.1 keV

Spin

2-

Discovered

1953

Binding energy per nucleon

7,880 keV

Neutron separation energy

6,656 keV

Proton separation energy

6,366 keV

Decay Mode

Decay chain

Thallium-204Z 81 · N 1233.78 y
β⁻97.08%