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Palladium vs Lead

Palladium
Lead
Lead vs Palladium


Periodic Table
Symbol
Pd   
Pb   
Group Number
10   
8
14   
4
Period Number
5   
6   
Block
d block   
p block   
Element Family
Transition Metal   
Post-​Transition   
CAS Number
7440053   
99+
7439921   
99+
Space Group Name
Fm_ 3m   
Fm_ 3m   
Space Group Number
225.00   
2
225.00   
2
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
  
  • Galena mineral contains almost 87% of Lead metal in it, Galena is sulfide mineral.
  • The best available source of Lead metal today is by recycling automobile batteries.
  
Sources
Ores of metals   
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals   
History
  
  
Who Discovered
William Hyde Wollaston   
Unknown   
Discovery
In 1803   
In Middle Easterns (7000 BCE)   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
1 * 10-6 %   
16
Abundance In Sun
~0.0000003 %   
24
~0.000001 %   
18
Abundance In Meteorites
0.00 %   
99+
0.00 %   
23
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
26
Abundance In Oceans
Not Available   
0.00 %   
22
Abundance In Humans
Not Available   
0.00 %   
8
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 also used in insecticides, hair dyes and as an anti-knocking additive for petrol. But all these are banned by the government as Lead metal is known for detrimental to health.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electronic Industry   
Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing   
Surgical Instruments Manufacturing   
Other Uses
Coinage, Bullion, Jewellery   
Alloys   
Biological Properties
  
  
Toxicity
Toxic   
Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
0.21 Blood/mg dm-3   
11
In Bone
Not Available   
30.00 p.p.m.   
10
Physical Properties
Melting Point
1,554.90 °C   
22
327.50 °C   
99+
Boiling Point
2,963.00 °C   
33
1,740.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
4.75   
9
1.50   
18
Brinell Hardness
320.00 MPa   
33
38.00 MPa   
99+
Vickers Hardness
121.00 MPa   
36
Not Available   
Speed of Sound
3,070.00 m/s   
26
1,190.00 m/s   
99+
Optical Properties
  
  
Refractive Index
1.72   
1
Not Available   
Reflectivity
84.00 %   
4
Not Available   
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
Pd   
Pb   
Isotopes
  
  
Known Isotopes
38   
1
35   
4
Electronegativity
  
  
Pauling Electronegativity
2.20   
4
1.87   
13
Sanderson Electronegativity
Not Available   
2.29   
4
Allred Rochow Electronegativity
1.35   
21
1.55   
11
Mulliken-Jaffe Electronegativity
Not Available   
2.41   
2
Allen Electronegativity
1.59   
22
1.85   
8
Electropositivity
  
  
Pauling Electropositivity
1.80   
99+
1.67   
99+
Ionization Energies
  
  
1st Energy Level
520.23 kJ/mol   
99+
715.60 kJ/mol   
31
2nd Energy Level
7,298.22 kJ/mol   
2
1,450.50 kJ/mol   
99+
3rd Energy Level
11,815.13 kJ/mol   
3
3,081.50 kJ/mol   
23
4th Energy Level
Not Available   
4,083.00 kJ/mol   
35
5th Energy Level
Not Available   
6,640.00 kJ/mol   
20
Electrochemical Equivalent
1.99 g/amp-hr   
30
3.87 g/amp-hr   
9
Electron Work Function
5.12 eV   
3
4.25 eV   
21
Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
46   
99+
82   
34
Electron Configuration
[Kr] 4d10   
[Xe] 4f14 5d10 6s2 6p2   
Crystal Structure
Face Centered Cubic (FCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Palladium.jpg#100   
FCC-Crystal-Structure-of-Lead.jpg#100   
Atom
  
  
Number of Protons
46   
99+
82   
34
Number of Neutrons
60   
99+
125   
19
Number of Electrons
46   
99+
82   
34
Radius of an Atom
  
  
Atomic Radius
137.00 pm   
40
175.00 pm   
19
Covalent Radius
139.00 pm   
99+
146.00 pm   
38
Van der Waals Radius
163.00 pm   
40
202.00 pm   
27
Atomic Weight
106.42 amu   
99+
207.20 amu   
30
Atomic Volume
8.90 cm3/mol   
99+
18.17 cm3/mol   
27
Adjacent Atomic Numbers
  
  
Previous Element
Rhodium
  
Thallium
  
Next Element
Silver
  
Bismuth
  
Valence Electron Potential
33.00 (-eV)   
99+
24.20 (-eV)   
99+
Lattice Constant
389.07 pm   
25
495.08 pm   
16
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
12.02 g/cm3   
29
11.34 g/cm3   
33
Density When Liquid (at m.p.)
10.38 g/cm3   
17
10.66 g/cm3   
15
Tensile Strength
Not Available   
12.00 MPa   
20
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
27
1.64 (Pa)   
7
Vapor Pressure at 2000 K
0.00 (Pa)   
30
Not Available   
Elasticity properties
  
  
Shear Modulus
44.00 GPa   
17
5.60 GPa   
99+
Bulk Modulus
180.00 GPa   
9
46.00 GPa   
24
Young's Modulus
121.00 GPa   
16
16.00 GPa   
99+
Poisson Ratio
0.39   
5
0.44   
3
Other Mechanical Properties
Ductile, Malleable, Weldable   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
12.02   
21
11.35   
25
Magnetic Ordering
Diamagnetic   
Diamagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Poor Conductor   
Resistivity
105.40 nΩ·m   
29
208.00 nΩ·m   
16
Electrical Conductivity
0.10 106/cm Ω   
22
0.05 106/cm Ω   
36
Electron Affinity
54.23 kJ/mol   
17
35.10 kJ/mol   
28
Thermal Properties
Specific Heat
0.24 J/(kg K)   
23
0.13 J/(kg K)   
39
Molar Heat Capacity
25.98 J/mol·K   
33
26.65 J/mol·K   
26
Thermal Conductivity
71.80 W/m·K   
23
35.30 W/m·K   
38
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
11.80 µm/(m·K)   
33
28.90 µm/(m·K)   
13
Enthalpy
  
  
Enthalpy of Vaporization
376.60 kJ/mol   
19
179.40 kJ/mol   
99+
Enthalpy of Fusion
16.74 kJ/mol   
18
4.77 kJ/mol   
99+
Enthalpy of Atomization
393.30 kJ/mol   
22
194.60 kJ/mol   
99+
Standard Molar Entropy
37.60 J/mol.K   
40
64.80 J/mol.K   
17
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