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Be - Beryllium - periodic table of the elements

Beryllium is an alkaline earth metal, many compounds of which are toxic. Discovery of the element in the mineral beryl, was reported by Nicolas Louis Vauquelin in 1789. Beryllium metal was isolated by Wöhler and Bussy in 1828. Little known fact: the speed of sound in beryllium (12,500 m/s) is greater than in any other element.


Atomic number - 4 Density g/mL 1 .85
Atomic weight u 9 .01218 Melting point K 1560
Bonding radius A 0 .9 Boiling point K 2745
Atomic radius A 1 .4 Heat of vaporization kJ/mol 292 .4
Ionization Potential V 9 .322 Heat of fusion kJ/mol 12 .2
Electronegativity - 1 .57 Specific heat J/gK 1 .82
The oxide is amphoteric.
Crystal are hexagonal.

Electron configuration: 1s2 2s2

Other elements of the periodic table

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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLa * HfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAc ** RfDbSgBhHsMt110111112113
Lanthanides* CePrNdPmSmEuGdTbDyHoErTmYbLu
Actinides ** ThPaUNpPuAmCmBkCfEsFmMdNoLr