Be
Beryllium
4
Atomic Number: 4
Atomic mass: 9.0121823
Ionization energy: 900
Electronaffinity: 0
Covalent radius: 90
Calculated radius: 112
Empirical radius: 105
Vanderwaals radius:
Electronegativity: 1.57
Density: 1.85
Oxidation states: 2
Melting point: 1560
Boiling point: 2743
Electron configuration: [He] 2s2
Element group: 2
Element period: 2

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