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Radium Properties
Radium


Physical
0
Melting Point
700.00 °C 59
Boiling Point
1,737.00 °C 54
Hardness
0
Mohs Hardness
Not Available 0
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
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Ra 0
Isotopes
0
Known Isotopes
33 6
Electronegativity
0
Pauling Electronegativity
0.90 49
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
0.97 38
Mulliken-Jaffe Electronegativity
0.92 20
Allen Electronegativity
0.89 42
Electropositivity
0
Pauling Electropositivity
3.10 5
Ionization Energies
0
1st Energy Level
509.30 kJ/mol 82
2nd Energy Level
979.00 kJ/mol 81
3rd Energy Level
Not Available 0
Electrochemical Equivalent
4.22 g/amp-hr 6
Electron Work Function
Not Available 0
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity 0
Mechanical
0
Density
0
Density At Room Temperature
5.50 g/cm3 68
Density When Liquid (at m.p.)
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
Not Available 0
Bulk Modulus
Not Available 0
Young's Modulus
Not Available 0
Poisson Ratio
Not Available 0
Other Mechanical Properties
NA 0
Periodic Table
0
Symbol
Ra 0
Group Number
2 16
Period Number
7 1
Block
s block 0
Element Family
Alkaline Earth 0
Atomic
0
Atomic Number
88 30
Atomic Weight
226.00 amu 26
Atomic Volume
45.20 cm3/mol 4
Electron Configuration
[Rn] 7s2 0
Valence Electron Potential
20.10 (-eV) 59
Atom
0
Number of Protons
88 30
Number of Neutrons
138 16
Number of Electrons
88 30
Crystal Structure
Body Centered Cubic (BCC) 0
Crystal Lattice
BCC-Crystal-Structure-.jpg#100 0
Radius of an Atom
0
Atomic Radius
Not Available 0
Covalent Radius
221.00 pm 3
Van der Waals Radius
283.00 pm 4
Lattice Constant
514.80 pm 13
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Adjacent Atomic Numbers
0
Next Element
53 0
Previous Element
47 0
Magnetic
0
Electrical Properties
0
Resistivity
100.00 nΩ·m 31
Electrical Conductivity
Not Available 0
Electron Affinity
Not Available 0
Electrical Property
NA 0
Magnetic Characteristics
0
Specific Gravity
5.00 56
Magnetic Ordering
Nonmagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.12 J/(kg K) 40
Thermal Conductivity
18.60 W/m·K 45
Critical Temperature
Not Available 0
Molar Heat Capacity
Not Available 0
Thermal Expansion
Not Available 0
Standard Molar Entropy
71.00 J/mol.K 14
Enthalpy
0
Enthalpy of Vaporization
Not Available 0
Enthalpy of Fusion
Not Available 0
Enthalpy of Atomization
163.00 kJ/mol 51
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