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Palladium vs Mercury

Palladium
Mercury
Mercury vs Palladium


Periodic Table
Symbol
Pd  
Hg  
Group Number
10  
8
12  
6
Period Number
5  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440053  
99+
7439976  
99+
Space Group Name
Fm_ 3m  
R_ 3m  
Space Group Number
225.00  
3
166.00  
9
Facts
Interesting Facts
  • 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
  
  • At room temperature mercury is found in a liquid state.
  • A coin of pound or rupees floats in mercury.
  • Because of its low melting point and boiling point it is used in thermometers.
  
Sources
Ores of metals  
Mining, Ores of Minerals  
History
  
  
Who Discovered
William Hyde Wollaston  
Ancient Chinese and Indians  
Discovery
In 1803  
Before 2000 BCE  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.09 %  
2
Abundance In Sun
0.00 %  
24
0.00 %  
30
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.05 %  
9
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • 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.
  
  • It is a liquid metal at room temperature, but it is a toxic heavy metal and hence many uses of mercury are under review or phased out.
  • It is manly used as a catalysts in chemical industry.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electronic Industry  
Electrical Industry, Electronic Industry  
Medical Uses
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing  
Dentistry  
Other Uses
Coinage, Bullion, Jewellery  
Alloys, Mirror Manufacturing, Pharmaceutical Industry  
Biological Properties
  
  
Toxicity
Toxic  
Highly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.01 Blood/mg dm-3  
23
In Bone
0.00 p.p.m.  
99+
0.45 p.p.m.  
23
Physical
Melting Point
1,554.90 °C  
22
-38.83 °C  
99+
Boiling Point
2,963.00 °C  
34
356.58 °C  
99+
Appearance
  
  
Physical State
Solid  
Liquid  
Color
Silver  
Silver  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
4.75  
9
1.50  
19
Brinell Hardness
320.00 MPa  
40
5.00 MPa  
99+
Vickers Hardness
121.00 MPa  
99+
0.00 MPa  
99+
Speed of Sound
3,070.00 m/s  
38
1,451.40 m/s  
99+
Optical Properties
  
  
Refractive Index
1.72  
25
1.00  
99+
Reflectivity
84.00 %  
5
73.00 %  
10
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pd  
Hg  
Isotopes
  
  
Known Isotopes
38  
1
34  
5
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
2.00  
8
Sanderson Electronegativity
2.20  
8
2.20  
8
Allred Rochow Electronegativity
1.35  
22
1.44  
18
Mulliken-Jaffe Electronegativity
2.20  
6
1.81  
17
Allen Electronegativity
1.59  
25
1.44  
34
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.00  
99+
Ionization Energies
  
  
1st Energy Level
520.23 kJ/mol  
99+
1,007.10 kJ/mol  
4
2nd Energy Level
7,298.22 kJ/mol  
2
1,810.00 kJ/mol  
21
3rd Energy Level
11,815.13 kJ/mol  
3
3,300.00 kJ/mol  
20
4th Energy Level
870.00 kJ/mol  
99+
1,007.10 kJ/mol  
99+
5th Energy Level
8,044.00 kJ/mol  
13
1,007.00 kJ/mol  
99+
6th Energy Level
8,044.00 kJ/mol  
33
1,007.00 kJ/mol  
99+
7th Energy level
8,040.00 kJ/mol  
27
1,007.00 kJ/mol  
99+
8th Energy Level
8,040.00 kJ/mol  
27
1,007.00 kJ/mol  
99+
9th Energy Level
8,040.00 kJ/mol  
24
1,007.00 kJ/mol  
99+
10th Energy Level
8,040.00 kJ/mol  
28
1,007.00 kJ/mol  
99+
11th Energy Level
8,040.00 kJ/mol  
27
1,007.00 kJ/mol  
99+
12th Energy Level
8,040.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
13th Energy Level
5,310.00 kJ/mol  
99+
1,007.00 kJ/mol  
99+
14th Energy Level
804.40 kJ/mol  
99+
1,007.00 kJ/mol  
99+
15th Energy Level
80,400.00 kJ/mol  
16
100,700.00 kJ/mol  
1
16th Energy Level
804.40 kJ/mol  
99+
1,007.00 kJ/mol  
99+
17th Energy Level
804.40 kJ/mol  
33
1,007.00 kJ/mol  
24
18th Energy Level
8,045.00 kJ/mol  
22
1,007.00 kJ/mol  
99+
19th Energy Level
804.40 kJ/mol  
30
1,007.10 kJ/mol  
20
20th Energy Level
804.00 kJ/mol  
23
1,007.00 kJ/mol  
11
21st Energy Level
804.40 kJ/mol  
99+
1,007.00 kJ/mol  
33
22nd Energy Level
804.00 kJ/mol  
18
1,007.00 kJ/mol  
8
23rd Energy Level
804.40 kJ/mol  
99+
1,007.00 kJ/mol  
36
24th Energy Level
804.40 kJ/mol  
14
1,007.10 kJ/mol  
3
25th Energy Level
804.40 kJ/mol  
12
1,007.10 kJ/mol  
3
26th Energy Level
804.40 kJ/mol  
12
1,007.10 kJ/mol  
3
27th Energy Level
804.40 kJ/mol  
11
1,007.10 kJ/mol  
2
28th Energy Level
804.40 kJ/mol  
17
1,007.10 kJ/mol  
5
29th Energy Level
804.40 kJ/mol  
16
1,007.10 kJ/mol  
6
30th Energy Level
804.00 kJ/mol  
12
1,007.10 kJ/mol  
3
Electrochemical Equivalent
1.99 g/amp-hr  
34
3.74 g/amp-hr  
10
Electron Work Function
5.12 eV  
7
4.49 eV  
20
Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Solubility  
Flammability, Ionization, Solubility  
Atomic
Atomic Number
46  
99+
80  
36
Electron Configuration
[Kr] 4d10  
[Xe] 4f14 5d10 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Rhombohedral (RHO)  
Crystal Lattice
FCC-Crystal-Structure-of-Palladium.jpg#100  
RHO-Crystal-Structure-of-Mercury.jpg#100  
Atom
  
  
Number of Protons
46  
99+
80  
36
Number of Neutrons
60  
99+
121  
23
Number of Electrons
46  
99+
80  
36
Radius of an Atom
  
  
Atomic Radius
137.00 pm  
99+
151.00 pm  
34
Covalent Radius
139.00 pm  
99+
132.00 pm  
99+
Van der Waals Radius
163.00 pm  
99+
155.00 pm  
99+
Atomic Weight
106.42 amu  
99+
200.59 amu  
32
Atomic Volume
8.90 cm3/mol  
99+
14.82 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rhodium
  
Gold
  
Next Element
Silver
  
Thallium
  
Valence Electron Potential
33.00 (-eV)  
99+
28.20 (-eV)  
99+
Lattice Constant
389.07 pm  
28
300.50 pm  
99+
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.56  
99+
0.42  
99+
Mechanical
Density
  
  
Density At Room Temperature
12.02 g/cm3  
31
13.53 g/cm3  
25
Density When Liquid (at m.p.)
10.38 g/cm3  
38
13.55 g/cm3  
27
Tensile Strength
550.00 MPa  
8
15.00 MPa  
99+
Viscosity
0.00  
14
0.00  
4
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
29
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
44.00 GPa  
17
30.00 GPa  
27
Bulk Modulus
180.00 GPa  
9
25.00 GPa  
99+
Young's Modulus
121.00 GPa  
18
45.00 GPa  
99+
Poisson Ratio
0.39  
5
0.44  
3
Other Mechanical Properties
Ductile, Malleable, Weldable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
12.02  
33
13.53  
27
Magnetic Ordering
Diamagnetic  
Diamagnetic  
Permeability
0.00 H/m  
18
0.00 H/m  
10
Susceptibility
0.00  
27
0.00  
20
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
105.40 nΩ·m  
29
961.00 nΩ·m  
1
Electrical Conductivity
0.10 106/cm Ω  
27
0.01 106/cm Ω  
99+
Electron Affinity
54.23 kJ/mol  
21
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.24 J/(kg K)  
23
0.14 J/(kg K)  
39
Molar Heat Capacity
25.98 J/mol·K  
99+
27.98 J/mol·K  
16
Thermal Conductivity
71.80 W/m·K  
23
8.30 W/m·K  
99+
Critical Temperature
1,825.00 K  
26
1,750.00 K  
33
Thermal Expansion
11.80 µm/(m·K)  
99+
60.40 µm/(m·K)  
5
Enthalpy
  
  
Enthalpy of Vaporization
376.60 kJ/mol  
28
56.90 kJ/mol  
99+
Enthalpy of Fusion
16.74 kJ/mol  
18
2.29 kJ/mol  
99+
Enthalpy of Atomization
393.30 kJ/mol  
29
61.50 kJ/mol  
99+
Standard Molar Entropy
37.60 J/mol.K  
99+
75.80 J/mol.K  
6
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