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Barium Properties
Barium


Physical
0
Melting Point
725.00 °C 58
Boiling Point
1,140.00 °C 64
Hardness
0
Mohs Hardness
1.25 19
Brinell Hardness
Not Available 0
Vickers Hardness
Not Available 0
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
1,620.00 m/s 47
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Ba 0
Isotopes
0
Known Isotopes
37 2
Electronegativity
0
Pauling Electronegativity
0.89 50
Sanderson Electronegativity
0.68 28
Allred Rochow Electronegativity
0.97 38
Mulliken-Jaffe Electronegativity
0.88 22
Allen Electronegativity
0.88 43
Electropositivity
0
Pauling Electropositivity
3.11 4
Ionization Energies
0
1st Energy Level
502.90 kJ/mol 83
2nd Energy Level
965.20 kJ/mol 82
3rd Energy Level
3,600.00 kJ/mol 14
Electrochemical Equivalent
2.56 g/amp-hr 20
Electron Work Function
2.70 eV 41
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
3.51 g/cm3 72
Density When Liquid (at m.p.)
3.34 g/cm3 50
Vapor Pressure
0
Vapor Pressure at 1000 K
7.11 (Pa) 6
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
4.90 GPa 48
Bulk Modulus
9.60 GPa 45
Young's Modulus
13.00 GPa 50
Poisson Ratio
Not Available 0
Other Mechanical Properties
NA 0
Periodic Table
0
Symbol
Ba 0
Group Number
2 16
Period Number
6 2
Block
s block 0
Element Family
Alkaline Earth 0
Atomic
0
Atomic Number
56 60
Atomic Weight
137.33 amu 54
Atomic Volume
39.24 cm3/mol 5
Electron Configuration
[Xe] 6s2 0
Valence Electron Potential
21.30 (-eV) 58
Atom
0
Number of Protons
56 59
Number of Neutrons
81 42
Number of Electrons
56 59
Crystal Structure
Body Centered Cubic (BCC) 0
Crystal Lattice
BCC-Crystal-Structure-.jpg#100 0
Radius of an Atom
0
Atomic Radius
222.00 pm 4
Covalent Radius
215.00 pm 5
Van der Waals Radius
268.00 pm 6
Lattice Constant
502.80 pm 15
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Adjacent Atomic Numbers
0
Next Element
72 0
Previous Element
40 0
Magnetic
0
Electrical Properties
0
Resistivity
332.00 nΩ·m 13
Electrical Conductivity
0.03 106/cm Ω 40
Electron Affinity
13.95 kJ/mol 36
Electrical Property
Superconductor 0
Magnetic Characteristics
0
Specific Gravity
3.62 60
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.20 J/(kg K) 30
Thermal Conductivity
18.40 W/m·K 46
Critical Temperature
Not Available 0
Molar Heat Capacity
28.07 J/mol·K 12
Thermal Expansion
20.60 µm/(m·K) 22
Standard Molar Entropy
62.50 J/mol.K 20
Enthalpy
0
Enthalpy of Vaporization
140.00 kJ/mol 49
Enthalpy of Fusion
7.66 kJ/mol 42
Enthalpy of Atomization
175.70 kJ/mol 49
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