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Thorium vs Palladium

Thorium
Palladium
Palladium vs Thorium


Periodic Table
Symbol
Th   
Pd   
Group Number
0   
18
10   
8
Period Number
7   
5   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440326   
99+
7440053   
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.
  
  • Palladium alloys are used for Jewelry contains (95% Palladium and 5% Ruthenium)
  • In the late 1800s, Palladium metal used have more economical value than the Platinum metal.
  • Palladium element is known as a good catalyst
  
Sources
Found in Minerals, Mining   
Ores of metals   
History
  
  
Who Discovered
Jöns Jakob Berzelius   
William Hyde Wollaston   
Discovery
In 1829   
In 1803   
Abundance
  
  
Abundance In Universe
3 * 10-4 %   
9
2 * 10-7 %   
22
Abundance In Sun
~0.0004 %   
9
~0.0000003 %   
24
Abundance In Meteorites
0.05 %   
11
0.00 %   
99+
Abundance In Earth's Crust
0.66 %   
7
0.00 %   
99+
Abundance In Oceans
0.00 %   
15
Not Available   
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.
  
  • Mostly palladium metal is used in catalytic converters. In electronic industry it is used in ceramic capacitors of mobile and computer.
  • It is used in jewellery and dental fillings and crowns.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Aerospace Industry, Automobile Industry, Electronic Industry   
Medical Uses
Dentistry, Surgical Instruments Manufacturing   
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing   
Other Uses
Alloys, Jewellery, Sculptures, Statues   
Coinage, Bullion, Jewellery   
Biological Properties
  
  
Toxicity
Non Toxic   
Toxic   
Present in Human Body
Yes   
No   
In Blood
0.00 Blood/mg dm-3   
33
Not Available   
In Bone
0.02 p.p.m.   
29
Not Available   
Physical Properties
Melting Point
1,750.00 °C   
17
1,554.90 °C   
22
Boiling Point
4,790.00 °C   
8
2,963.00 °C   
33
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silver   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
3.00   
12
4.75   
9
Brinell Hardness
390.00 MPa   
29
320.00 MPa   
33
Vickers Hardness
295.00 MPa   
29
121.00 MPa   
36
Speed of Sound
2,490.00 m/s   
36
3,070.00 m/s   
26
Optical Properties
  
  
Refractive Index
Not Available   
1.72   
1
Reflectivity
Not Available   
84.00 %   
4
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   
Pd   
Isotopes
  
  
Known Isotopes
28   
11
38   
1
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
2.20   
4
Allred Rochow Electronegativity
1.11   
29
1.35   
21
Allen Electronegativity
Not Available   
1.59   
22
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
1.80   
99+
Ionization Energies
  
  
1st Energy Level
587.00 kJ/mol   
99+
520.23 kJ/mol   
99+
2nd Energy Level
1,110.00 kJ/mol   
99+
7,298.22 kJ/mol   
2
3rd Energy Level
1,978.00 kJ/mol   
99+
11,815.13 kJ/mol   
3
4th Energy Level
2,780.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
2.16 g/amp-hr   
24
1.99 g/amp-hr   
30
Electron Work Function
3.41 eV   
32
5.12 eV   
3
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity   
Chemical Stability, Corrosion, Ionization, Solubility   
Atomic Properties
Atomic Number
90   
28
46   
99+
Electron Configuration
[Rn] 6d2 7s2   
[Kr] 4d10   
Crystal Structure
Face Centered Cubic (FCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100   
FCC-Crystal-Structure-of-Palladium.jpg#100   
Atom
  
  
Number of Protons
90   
28
46   
99+
Number of Neutrons
142   
15
60   
99+
Number of Electrons
90   
28
46   
99+
Radius of an Atom
  
  
Atomic Radius
179.80 pm   
15
137.00 pm   
40
Covalent Radius
206.00 pm   
7
139.00 pm   
99+
Van der Waals Radius
237.00 pm   
15
163.00 pm   
40
Atomic Weight
232.04 amu   
23
106.42 amu   
99+
Atomic Volume
19.90 cm3/mol   
20
8.90 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Actinium
  
Rhodium
  
Next Element
Protactinium
  
Silver
  
Valence Electron Potential
59.30 (-eV)   
23
33.00 (-eV)   
99+
Lattice Constant
508.42 pm   
14
389.07 pm   
25
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
12.02 g/cm3   
29
Density When Liquid (at m.p.)
Not Available   
10.38 g/cm3   
17
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
27
Vapor Pressure at 2000 K
0.00 (Pa)   
22
0.00 (Pa)   
30
Elasticity properties
  
  
Shear Modulus
31.00 GPa   
21
44.00 GPa   
17
Bulk Modulus
54.00 GPa   
22
180.00 GPa   
9
Young's Modulus
79.00 GPa   
24
121.00 GPa   
16
Poisson Ratio
0.27   
20
0.39   
5
Other Mechanical Properties
Ductile   
Ductile, Malleable, Weldable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.70   
23
12.02   
21
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Superconductor   
Conductor   
Resistivity
157.00 nΩ·m   
22
105.40 nΩ·m   
29
Electrical Conductivity
0.07 106/cm Ω   
31
0.10 106/cm Ω   
22
Electron Affinity
Not Available   
54.23 kJ/mol   
17
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.24 J/(kg K)   
23
Molar Heat Capacity
26.23 J/mol·K   
30
25.98 J/mol·K   
33
Thermal Conductivity
54.00 W/m·K   
28
71.80 W/m·K   
23
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
11.00 µm/(m·K)   
36
11.80 µm/(m·K)   
33
Enthalpy
  
  
Enthalpy of Vaporization
429.00 kJ/mol   
15
376.60 kJ/mol   
19
Enthalpy of Fusion
15.48 kJ/mol   
19
16.74 kJ/mol   
18
Enthalpy of Atomization
468.60 kJ/mol   
15
393.30 kJ/mol   
22
Standard Molar Entropy
27.30 J/mol.K   
99+
37.60 J/mol.K   
40
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