Ru
Ruthenium-104
Protons (Z)
44
Neutrons (N)
60
Mass number
104
Half-Life
Observationally stable
Abundance
18.62%
Mass
103.905 u
Mass Excess
-88,095.8 keV
Spin
0+
Discovered
1931
Binding energy per nucleon
8,587 keV
Neutron separation energy
8,900 keV
Proton separation energy
10,781 keV
Decay Mode
- β⁻