Er
Erbium-167
Protons (Z)
68
Neutrons (N)
99
Mass number
167
Half-Life
Stable
Abundance
22.869%
Mass
166.932 u
Mass Excess
-63,289.26 keV
Spin
7/2+
Discovered
1934
Binding energy per nucleon
8,132 keV
Neutron separation energy
6,436 keV
Proton separation energy
7,508 keV
Decay Mode
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