Pt

Platinum-199

Protons (Z)

78

Neutrons (N)

121

Mass number

199

Half-Life

30.8 m

Abundance

---

Mass

198.971 u

Mass Excess

-27,388.7 keV

Spin

5/2-

Discovered

1937

Binding energy per nucleon

7,902 keV

Neutron separation energy

5,556 keV

Proton separation energy

8,968 keV

Decay Mode

β⁻Gold-199100%

Decay chain

Platinum-199Z 78 · N 12130.8 m
β⁻100%
β⁻100%