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Beryllium  SEE PERIODIC TABLE
see article  SEE FULL ARTICLE


Atomic Number4

Atomic SymbolBe

Atomic Weight9.012182 amu

GroupAlkaline Earth, 2

FormSolid

Density @ STP1.85 g/cm3

Melting Point1287 °C (2348.6 °F, 1560.2 °K)

Boiling Point2471 °C (4479.8 °F, 2744.2 °K)

Heat of Fusion7.895 kJ/mol

Heat of Vaporization297 kJ/mol

First Ionization Potential9.32263 eV

Electronegativity (on Pauling scale)1.57

Specific Heat Capacity1.825 J/g K

Ground State Electron Configuration2s2

Oxidation States+2

Stable Isotopes and Natural Abundance on Earth9Be, 100%

Selected Radioisotopes7Be

Atomic Radius112 pm

Crystal StructureHexagonal

Discovered byVauquelin, 1798

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