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Beryllium Properties
Beryllium


Physical
0
Melting Point
1,278.00 °C 36
Boiling Point
2,970.00 °C 32
Hardness
0
Mohs Hardness
5.50 7
Brinell Hardness
590.00 MPa 21
Vickers Hardness
1,670.00 MPa 4
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
12,890.00 m/s 2
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Be 0
Isotopes
0
Known Isotopes
9 29
Electronegativity
0
Pauling Electronegativity
1.57 24
Sanderson Electronegativity
1.81 12
Allred Rochow Electronegativity
1.47 14
Mulliken-Jaffe Electronegativity
1.54 12
Allen Electronegativity
1.58 23
Electropositivity
0
Pauling Electropositivity
2.43 30
Ionization Energies
0
1st Energy Level
899.50 kJ/mol 7
2nd Energy Level
1,757.10 kJ/mol 23
3rd Energy Level
14,848.70 kJ/mol 2
Electrochemical Equivalent
0.17 g/amp-hr 76
Electron Work Function
4.98 eV 6
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes 0
Mechanical
0
Density
0
Density At Room Temperature
1.85 g/cm3 78
Density When Liquid (at m.p.)
1.69 g/cm3 54
Vapor Pressure
0
Vapor Pressure at 1000 K
0.00 (Pa) 19
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
132.00 GPa 7
Bulk Modulus
130.00 GPa 13
Young's Modulus
287.00 GPa 7
Poisson Ratio
0.03 35
Other Mechanical Properties
NA 0
Periodic Table
0
Symbol
Be 0
Group Number
2 16
Period Number
2 6
Block
s block 0
Element Family
Alkaline Earth 0
Atomic
0
Atomic Number
4 91
Atomic Weight
9.01 amu 85
Atomic Volume
5.00 cm3/mol 63
Electron Configuration
[He] 2s2 0
Valence Electron Potential
82.00 (-eV) 15
Atom
0
Number of Protons
4 90
Number of Neutrons
5 67
Number of Electrons
4 90
Crystal Structure
Hexagonal Close Packed (HCP) 0
Crystal Lattice
HCP-Crystal-Structure-of-Beryllium.jpg#100 0
Radius of an Atom
0
Atomic Radius
112.00 pm 51
Covalent Radius
96.00 pm 54
Van der Waals Radius
153.00 pm 43
Lattice Constant
228.58 pm 69
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
1.57 18
Adjacent Atomic Numbers
0
Next Element
4 0
Previous Element
19 0
Magnetic
0
Electrical Properties
0
Resistivity
36.00 nΩ·m 47
Electrical Conductivity
0.31 106/cm Ω 5
Electron Affinity
0.00 kJ/mol 40
Electrical Property
Semiconductor 0
Magnetic Characteristics
0
Specific Gravity
1.85 65
Magnetic Ordering
Diamagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
1.82 J/(kg K) 2
Thermal Conductivity
200.00 W/m·K 6
Critical Temperature
Not Available 0
Molar Heat Capacity
16.44 J/mol·K 56
Thermal Expansion
11.30 µm/(m·K) 34
Standard Molar Entropy
9.50 J/mol.K 58
Enthalpy
0
Enthalpy of Vaporization
294.70 kJ/mol 30
Enthalpy of Fusion
11.72 kJ/mol 30
Enthalpy of Atomization
326.40 kJ/mol 30
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