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Calcium Properties
Calcium


Physical
0
Melting Point
839.00 °C 52
Boiling Point
1,484.00 °C 58
Hardness
0
Mohs Hardness
1.75 17
Brinell Hardness
170.00 MPa 44
Vickers Hardness
Not Available 0
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
3,810.00 m/s 19
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Ca 0
Isotopes
0
Known Isotopes
19 20
Electronegativity
0
Pauling Electronegativity
1.00 45
Sanderson Electronegativity
0.95 24
Allred Rochow Electronegativity
1.04 34
Mulliken-Jaffe Electronegativity
1.08 17
Allen Electronegativity
1.03 39
Electropositivity
0
Pauling Electropositivity
3.00 9
Ionization Energies
0
1st Energy Level
589.80 kJ/mol 57
2nd Energy Level
1,145.40 kJ/mol 69
3rd Energy Level
4,912.40 kJ/mol 7
Electrochemical Equivalent
0.75 g/amp-hr 64
Electron Work Function
2.87 eV 38
Other Chemical Properties
Chemical Stability, Flammability, Ionization, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
1.55 g/cm3 80
Density When Liquid (at m.p.)
1.38 g/cm3 57
Vapor Pressure
0
Vapor Pressure at 1000 K
25.50 (Pa) 3
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
7.40 GPa 45
Bulk Modulus
17.00 GPa 43
Young's Modulus
20.00 GPa 46
Poisson Ratio
0.31 13
Other Mechanical Properties
NA 0
Periodic Table
0
Symbol
Ca 0
Group Number
2 16
Period Number
4 4
Block
s block 0
Element Family
Alkaline Earth 0
Atomic
0
Atomic Number
20 86
Atomic Weight
40.08 amu 80
Atomic Volume
29.90 cm3/mol 7
Electron Configuration
[Ar] 4s2 0
Valence Electron Potential
29.00 (-eV) 53
Atom
0
Number of Protons
20 85
Number of Neutrons
20 64
Number of Electrons
20 85
Crystal Structure
Face Centered Cubic (FCC) 0
Crystal Lattice
FCC-Crystal-Structure-of-Calcium.jpg#100 0
Radius of an Atom
0
Atomic Radius
197.00 pm 6
Covalent Radius
176.00 pm 22
Van der Waals Radius
231.00 pm 19
Lattice Constant
558.84 pm 9
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Adjacent Atomic Numbers
0
Next Element
60 0
Previous Element
9 0
Magnetic
0
Electrical Properties
0
Resistivity
33.60 nΩ·m 48
Electrical Conductivity
0.30 106/cm Ω 6
Electron Affinity
2.37 kJ/mol 39
Electrical Property
Conductor 0
Magnetic Characteristics
0
Specific Gravity
4.58 57
Magnetic Ordering
Diamagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.63 J/(kg K) 7
Thermal Conductivity
201.00 W/m·K 5
Critical Temperature
Not Available 0
Molar Heat Capacity
25.93 J/mol·K 34
Thermal Expansion
22.30 µm/(m·K) 19
Standard Molar Entropy
41.60 J/mol.K 36
Enthalpy
0
Enthalpy of Vaporization
150.00 kJ/mol 47
Enthalpy of Fusion
8.54 kJ/mol 41
Enthalpy of Atomization
184.00 kJ/mol 46
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