Ru
Ruthenium-99
Protons (Z)
44
Neutrons (N)
55
Mass number
99
Half-Life
Stable
Abundance
12.76%
Mass
98.906 u
Mass Excess
-87,625.4 keV
Spin
5/2+
Discovered
1931
Binding energy per nucleon
8,609 keV
Neutron separation energy
7,472 keV
Proton separation energy
8,482 keV
Decay Mode
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