Be

Beryllium-9

Protons (Z)

4

Neutrons (N)

5

Mass number

9

Half-Life

Stable

Abundance

100%

Mass

9.012 u

Mass Excess

11,348.45 keV

Spin

3/2-

Discovered

1921

Binding energy per nucleon

6,463 keV

Neutron separation energy

1,665 keV

Proton separation energy

16,886 keV

Decay Mode

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