Er

Erbium-166

Protons (Z)

68

Neutrons (N)

98

Mass number

166

Half-Life

Stable

Abundance

33.503%

Mass

165.93 u

Mass Excess

-64,924.1 keV

Spin

0+

Discovered

1934

Binding energy per nucleon

8,142 keV

Neutron separation energy

8,474 keV

Proton separation energy

7,315 keV

Decay Mode

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