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Radium Thorium Comparison

Radium
Thorium
Thorium Radium comparison


Periodic Table
Symbol
Ra   
Th   
Group Number
2   
16
0   
18
Period Number
7   
7   
Block
s block   
f block   
Element Family
Alkaline Earth   
Actinide   
CAS Number
7440144   
99+
7440326   
99+
Space Group Name
Im_ 3m   
P63/mmc   
Space Group Number
229.00   
1
194.00   
5
Facts
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.
  
  • Thorium metal is used as an alternate option over Uranium for nuclear fuel.
  • Thorium metals appearance (silvery white, soft) is somewhat similar to Lead metal.
  
Sources
Mining, Ores of metals   
Found in Minerals, Mining   
History
  
  
Who Discovered
Not Available   
Jöns Jakob Berzelius   
Discovery
In 1898   
In 1829   
Abundance
  
  
Abundance In Universe
Not Available   
3 * 10-4 %   
9
Abundance In Sun
~-9999 %   
~0.0004 %   
9
Abundance In Meteorites
Not Available   
0.05 %   
11
Abundance In Earth's Crust
0.00 %   
99+
0.66 %   
7
Abundance In Oceans
0.00 %   
99+
0.00 %   
15
Abundance In Humans
0.00 %   
20
Not Available   
Uses
Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
  • Thorium metal is used as an allying agent for Magnesium, It imparts greater strength and resistance to temperature.
  • compound of this metal Thorium oxide is used as an industrial catalyst.
  
Industrial Uses
NA   
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
Pharmaceutical Industry   
Dentistry, Surgical Instruments Manufacturing   
Other Uses
NA   
Alloys, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Highly Toxic   
Non Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
0.00 Blood/mg dm-3   
33
In Bone
Not Available   
0.02 p.p.m.   
29
Physical Properties
Melting Point
700.00 °C   
99+
1,750.00 °C   
17
Boiling Point
1,737.00 °C   
99+
4,790.00 °C   
8
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silver   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
Not Available   
3.00   
12
Brinell Hardness
Not Available   
390.00 MPa   
29
Vickers Hardness
Not Available   
295.00 MPa   
29
Speed of Sound
Not Available   
2,490.00 m/s   
36
Optical Properties
  
  
Allotropes
No   
No   
α Allotropes
Not Available   
Not Available   
β Allotropes
Not Available   
Not Available   
γ Allotropes
Not Available   
Not Available   
Chemical Properties
Chemical Formula
Ra   
Th   
Isotopes
  
  
Known Isotopes
33   
6
28   
11
Electronegativity
  
  
Pauling Electronegativity
0.90   
99+
1.30   
32
Allred Rochow Electronegativity
0.97   
38
1.11   
29
Mulliken-Jaffe Electronegativity
0.92   
20
Not Available   
Allen Electronegativity
0.89   
99+
Not Available   
Electropositivity
  
  
Pauling Electropositivity
3.10   
5
2.70   
22
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol   
99+
587.00 kJ/mol   
99+
2nd Energy Level
979.00 kJ/mol   
99+
1,110.00 kJ/mol   
99+
3rd Energy Level
Not Available   
1,978.00 kJ/mol   
99+
4th Energy Level
Not Available   
2,780.00 kJ/mol   
99+
Electrochemical Equivalent
4.22 g/amp-hr   
6
2.16 g/amp-hr   
24
Electron Work Function
Not Available   
3.41 eV   
32
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Corrosion, Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
88   
30
90   
28
Electron Configuration
[Rn] 7s2   
[Rn] 6d2 7s2   
Crystal Structure
Body Centered Cubic (BCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Thorium.jpg#100   
Atom
  
  
Number of Protons
88   
30
90   
28
Number of Neutrons
138   
16
142   
15
Number of Electrons
88   
30
90   
28
Radius of an Atom
  
  
Atomic Radius
Not Available   
179.80 pm   
15
Covalent Radius
221.00 pm   
3
206.00 pm   
7
Van der Waals Radius
283.00 pm   
4
237.00 pm   
15
Atomic Weight
226.00 amu   
26
232.04 amu   
23
Atomic Volume
45.20 cm3/mol   
4
19.90 cm3/mol   
20
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Actinium
  
Next Element
Actinium
  
Protactinium
  
Valence Electron Potential
20.10 (-eV)   
99+
59.30 (-eV)   
23
Lattice Constant
514.80 pm   
13
508.42 pm   
14
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
5.50 g/cm3   
99+
11.72 g/cm3   
32
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
22
Elasticity properties
  
  
Shear Modulus
Not Available   
31.00 GPa   
21
Bulk Modulus
Not Available   
54.00 GPa   
22
Young's Modulus
Not Available   
79.00 GPa   
24
Poisson Ratio
Not Available   
0.27   
20
Other Mechanical Properties
NA   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.00   
99+
11.70   
23
Magnetic Ordering
Nonmagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
NA   
Superconductor   
Resistivity
100.00 nΩ·m   
31
157.00 nΩ·m   
22
Electrical Conductivity
Not Available   
0.07 106/cm Ω   
31
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.12 J/(kg K)   
40
Molar Heat Capacity
Not Available   
26.23 J/mol·K   
30
Thermal Conductivity
18.60 W/m·K   
99+
54.00 W/m·K   
28
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
11.00 µm/(m·K)   
36
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
429.00 kJ/mol   
15
Enthalpy of Fusion
Not Available   
15.48 kJ/mol   
19
Enthalpy of Atomization
163.00 kJ/mol   
99+
468.60 kJ/mol   
15
Standard Molar Entropy
71.00 J/mol.K   
14
27.30 J/mol.K   
99+
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