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Beryllium

Chemical, physical and material properties and data of the chemical element Beryllium.


Contents


Beryllium

 

General Information about Beryllium

Regular nameBerylliumChemical symbolBeOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

 

Atomar Properties of Beryllium

Atomic number Z4 = number of protonsStandard Atomic Weight9.0121831 (5)

 

Electron configuration of Beryllium

1s2s2p3s3p3d4s4p4d4f5s5p5d5f6s6p6d6f7s7p
22

Shorthand electron configuration of Beryllium: [He] 2s2 .

 

Ionization Energies of Beryllium

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volt (eV) per atom to separate a given electron from an Beryllium atom.

IE1IE2IE3IE4
9.3227018.21114153.89661217.71865

 

Isotopic Data of Beryllium

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Beryllium isotopes.

 

Chemistry of Beryllium

 

Oxidation states+ 2Electronegativity1.5 (Pauling original)
1.57 (Pauling)
1.576 (Allen)
1.61 (Sanderson)
1.47 (Allred-Rochow)
3.7060 eV (Gosh Gupta)
4.9 eV (Pearson)
Electron affinity-0.5(2) eV
-48(20) kJ mol-1

 

Standard Electrode Potential

E0 (V)SymbolNoxName Ox.
Name Red.
Ox.
Red.
e-
-1.85Be+ II
0
Beryllium(II) cation
Beryllium
Be2+
⇄ Be (s)
+ 2 e-

 

Material and Physical Properties

Melting point1287 °CEnthalpy of fusion (molar)7.895 kJ mol-1Boiling point2469 °CEnthalpy of vaporization308.8 kJ mol-1Density1.85 g cm-3

 

External Data, Identifiers

CAS registry number7440-41-7InChI =1S/BePubChem ID5460467

 


More Chemistry

isotopes

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Last update: 2022-12-12


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