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Thorium vs Silver

Thorium
Silver
Silver vs Thorium


Periodic Table
Symbol
Th   
Ag   
Group Number
0   
18
11   
7
Period Number
7   
5   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440326   
99+
7440224   
99+
Space Group Name
P63/mmc   
Fm_ 3m   
Space Group Number
194.00   
5
225.00   
2
Facts
Interesting Facts
  • 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.
  
  • It is the most reflective element.
  • Silver is the second most ductile metal after Gold.
  • It is also used in Dentistry as a dental alloys for clips and crowning.
  
Sources
Found in Minerals, Mining   
Earth's crust, Found in Minerals, Ores of metals   
History
  
  
Who Discovered
Jöns Jakob Berzelius   
Unknown   
Discovery
In 1829   
Before 5000 BC   
Abundance
  
  
Abundance In Universe
3 * 10-4 %   
9
6 * 10-8 %   
26
Abundance In Sun
~0.0004 %   
9
~0.0000001 %   
26
Abundance In Meteorites
0.05 %   
11
0.00 %   
38
Abundance In Earth's Crust
0.66 %   
7
0.00 %   
99+
Abundance In Oceans
0.00 %   
15
0.00 %   
19
Uses
Uses & Benefits
  • 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.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Chemical Industry, Clothing Industry, Electrical Industry   
Medical Uses
Dentistry, Surgical Instruments Manufacturing   
Dentistry, Pharmaceutical Industry   
Other Uses
Alloys, Jewellery, Sculptures, Statues   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Non Toxic   
Non Toxic   
Present in Human Body
Yes   
Yes   
In Blood
0.00 Blood/mg dm-3   
33
0.00 Blood/mg dm-3   
29
In Bone
0.02 p.p.m.   
29
0.44 p.p.m.   
20
Physical Properties
Melting Point
1,750.00 °C   
17
961.93 °C   
99+
Boiling Point
4,790.00 °C   
8
2,212.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silvery White   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
3.00   
12
2.50   
14
Brinell Hardness
390.00 MPa   
29
251.00 MPa   
37
Vickers Hardness
295.00 MPa   
29
229.00 MPa   
30
Speed of Sound
2,490.00 m/s   
36
2,680.00 m/s   
34
Optical Properties
  
  
Reflectivity
Not Available   
97.00 %   
1
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
Th   
Ag   
Isotopes
  
  
Known Isotopes
28   
11
36   
3
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
1.93   
9
Sanderson Electronegativity
Not Available   
1.83   
11
Allred Rochow Electronegativity
1.11   
29
1.42   
18
Mulliken-Jaffe Electronegativity
Not Available   
1.47   
15
Allen Electronegativity
Not Available   
1.87   
7
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
2.07   
99+
Ionization Energies
  
  
1st Energy Level
587.00 kJ/mol   
99+
731.00 kJ/mol   
27
2nd Energy Level
1,110.00 kJ/mol   
99+
2,070.00 kJ/mol   
11
3rd Energy Level
1,978.00 kJ/mol   
99+
3,361.00 kJ/mol   
19
4th Energy Level
2,780.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
2.16 g/amp-hr   
24
4.02 g/amp-hr   
7
Electron Work Function
3.41 eV   
32
4.26 eV   
20
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity   
Chemical Stability, Ionization, Solubility   
Atomic Properties
Atomic Number
90   
28
47   
99+
Electron Configuration
[Rn] 6d2 7s2   
[Kr] 4d10 5s1   
Crystal Structure
Face Centered Cubic (FCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
FCC-Crystal-Structure-of-Silver.jpg#100   
Atom
  
  
Number of Protons
90   
28
47   
99+
Number of Neutrons
142   
15
61   
99+
Number of Electrons
90   
28
47   
99+
Radius of an Atom
  
  
Atomic Radius
179.80 pm   
15
144.00 pm   
36
Covalent Radius
206.00 pm   
7
145.00 pm   
39
Van der Waals Radius
237.00 pm   
15
172.00 pm   
38
Atomic Weight
232.04 amu   
23
107.87 amu   
99+
Atomic Volume
19.90 cm3/mol   
20
10.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Actinium
  
Palladium
  
Next Element
Protactinium
  
Cadmium
  
Valence Electron Potential
59.30 (-eV)   
23
11.40 (-eV)   
99+
Lattice Constant
508.42 pm   
14
408.53 pm   
20
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
11.72 g/cm3   
32
10.49 g/cm3   
35
Density When Liquid (at m.p.)
Not Available   
9.32 g/cm3   
21
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
14
Vapor Pressure at 2000 K
0.00 (Pa)   
22
Not Available   
Elasticity properties
  
  
Shear Modulus
31.00 GPa   
21
30.00 GPa   
23
Bulk Modulus
54.00 GPa   
22
100.00 GPa   
16
Young's Modulus
79.00 GPa   
24
83.00 GPa   
23
Poisson Ratio
0.27   
20
0.37   
7
Other Mechanical Properties
Ductile   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.70   
23
10.50   
26
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Susceptibility
Not Available   
0.00   
5
Electrical Properties
  
  
Electrical Property
Superconductor   
Conductor   
Resistivity
157.00 nΩ·m   
22
15.87 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
31
0.63 106/cm Ω   
1
Electron Affinity
Not Available   
125.60 kJ/mol   
5
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.24 J/(kg K)   
25
Molar Heat Capacity
26.23 J/mol·K   
30
25.35 J/mol·K   
99+
Thermal Conductivity
54.00 W/m·K   
28
429.00 W/m·K   
1
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
11.00 µm/(m·K)   
36
18.90 µm/(m·K)   
23
Enthalpy
  
  
Enthalpy of Vaporization
429.00 kJ/mol   
15
255.10 kJ/mol   
37
Enthalpy of Fusion
15.48 kJ/mol   
19
11.30 kJ/mol   
31
Enthalpy of Atomization
468.60 kJ/mol   
15
284.50 kJ/mol   
37
Standard Molar Entropy
27.30 J/mol.K   
99+
42.60 J/mol.K   
35
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