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What is Radium?
Radium


Periodic Table
0
Symbol
Ra 0
Group Number
2 16
Period Number
7 1
Block
s block 0
Element Family
Alkaline Earth 0
CAS Number
7440144 65
Space Group Name
Im_ 3m 0
Space Group Number
229.00 1
Facts
0
Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
0
Sources
Mining, Ores of metals 0
History
0
Who Discovered
Not Available 0
Discovery
In 1898 0
Abundance
0
Abundance In Universe
Not Available 0
Abundance In Sun
~-9999 % 0
Abundance In Meteorites
Not Available 0
Abundance In Earth's Crust
0.00 % 57
Abundance In Oceans
0.00 % 45
Abundance In Humans
0.00 % 20
Uses
0
Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
0
Industrial Uses
NA 0
Medical Uses
Pharmaceutical Industry 0
Other Uses
NA 0
Biological Properties
0
Toxicity
Highly Toxic 0
Present in Human Body
No 0
In Blood
Not Available 0
In Bone
Not Available 0
Physical
0
Melting Point
700.00 °C 59
Boiling Point
1,737.00 °C 54
Appearance
0
Physical State
Solid 0
Color
Silvery White 0
Luster
Metallic 0
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
Not Available 0
Vickers Hardness
Not Available 0
Speed of Sound
Not Available 0
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
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
4th Energy Level
Not Available 0
5th Energy Level
Not Available 0
6th Energy Level
Not Available 0
7th Energy level
Not Available 0
8th Energy Level
Not Available 0
9th Energy Level
Not Available 0
10th Energy Level
Not Available 0
11th Energy Level
Not Available 0
12th Energy Level
Not Available 0
13th Energy Level
Not Available 0
14th Energy Level
Not Available 0
15th Energy Level
Not Available 0
16th Energy Level
Not Available 0
17th Energy Level
Not Available 0
18th Energy Level
Not Available 0
19th Energy Level
Not Available 0
20th Energy Level
Not Available 0
21st Energy Level
Not Available 0
22nd Energy Level
Not Available 0
23rd Energy Level
Not Available 0
24th Energy Level
Not Available 0
25th Energy Level
Not Available 0
26th Energy Level
Not Available 0
27th Energy Level
Not Available 0
28th Energy Level
Not Available 0
29th Energy Level
Not Available 0
30th 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
Atomic
0
Atomic Number
88 30
Electron Configuration
[Rn] 7s2 0
Crystal Structure
Body Centered Cubic (BCC) 0
Crystal Lattice
BCC-Crystal-Structure-.jpg#100 0
Atom
0
Number of Protons
88 30
Number of Neutrons
138 16
Number of Electrons
88 30
Radius of an Atom
0
Atomic Radius
Not Available 0
Covalent Radius
221.00 pm 3
Van der Waals Radius
283.00 pm 4
Atomic Weight
226.00 amu 26
Atomic Volume
45.20 cm3/mol 4
Adjacent Atomic Numbers
0
Previous Element
47 0
Next Element
53 0
Valence Electron Potential
20.10 (-eV) 59
Lattice Constant
514.80 pm 13
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Mechanical
0
Density
0
Density At Room Temperature
5.50 g/cm3 68
Density When Liquid (at m.p.)
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
Vapor Pressure at 2000 K
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
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
5.00 56
Magnetic Ordering
Nonmagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
NA 0
Resistivity
100.00 nΩ·m 31
Electrical Conductivity
Not Available 0
Electron Affinity
Not Available 0
Thermal
0
Specific Heat
0.12 J/(kg K) 40
Molar Heat Capacity
Not Available 0
Thermal Conductivity
18.60 W/m·K 45
Critical Temperature
Not Available 0
Thermal Expansion
Not Available 0
Enthalpy
0
Enthalpy of Vaporization
Not Available 0
Enthalpy of Fusion
Not Available 0
Enthalpy of Atomization
163.00 kJ/mol 51
Standard Molar Entropy
71.00 J/mol.K 14
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