Symbol
Os
  
Pd
  
Period Number
6
  
5
  
Block
d block
  
d block
  
Element Family
Transition Metal
  
Transition Metal
  
Space Group Name
P63/mmc
  
Fm_ 3m
  
Interesting Facts
- Osmium metal does not oxidize in air unless it is heated.
- But if it heated den it forms Osmium Tetroxide, which is highly toxic.
  
- 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 As a By-product, Found in Minerals, Mining
  
Ores of metals
  
History
  
  
Who Discovered
Smithson Tennant
  
William Hyde Wollaston
  
Discovery
In 1803
  
In 1803
  
Abundance
  
  
Abundance In Sun
~0.0000002 %
  
25
~0.0000003 %
  
24
Abundance In Earth's Crust
Uses & Benefits
- Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
-
It is also used as industrial catalyst to speed up the chemical reaction.
  
- 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, Electrical Industry, Electronic Industry
  
Aerospace Industry, Automobile Industry, Electronic Industry
  
Medical Uses
NA
  
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing
  
Other Uses
Alloys
  
Coinage, Bullion, Jewellery
  
Biological Properties
  
  
Toxicity
Highly Toxic
  
Toxic
  
Present in Human Body
No
  
No
  
Melting Point
1,554.90 °C
  
22
Boiling Point
2,963.00 °C
  
33
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery Bluish-Gray
  
Silver
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Brinell Hardness
3,490.00 MPa
  
1
Vickers Hardness
Not Available
  
Speed of Sound
4,940.00 m/s
  
11
3,070.00 m/s
  
26
Optical Properties
  
  
Refractive Index
Not Available
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Os
  
Pd
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Allred Rochow Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
840.00 kJ/mol
  
12
520.23 kJ/mol
  
99+
2nd Energy Level
1,309.80 kJ/mol
  
99+
7,298.22 kJ/mol
  
2
3rd Energy Level
1,600.00 kJ/mol
  
99+
11,815.13 kJ/mol
  
3
Electrochemical Equivalent
1.77 g/amp-hr
  
38
1.99 g/amp-hr
  
30
Other Chemical Properties
Chemical Stability, Ionization, Solubility
  
Chemical Stability, Corrosion, Ionization, Solubility
  
Electron Configuration
[Xe] 4f14 5d6 6s2
  
[Kr] 4d10
  
Crystal Structure
Hexagonal Close Packed (HCP)
  
Face Centered Cubic (FCC)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
FCC-Crystal-Structure-of-Palladium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Covalent Radius
Not Available
  
Atomic Weight
106.42 amu
  
99+
Atomic Volume
8.49 cm3/mol
  
99+
8.90 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
91.40 (-eV)
  
12
33.00 (-eV)
  
99+
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Density
  
  
Density At Room Temperature
12.02 g/cm3
  
29
Density When Liquid (at m.p.)
10.38 g/cm3
  
17
Tensile Strength
1,000.00 MPa
  
4
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Elasticity properties
  
  
Young's Modulus
Not Available
  
Other Mechanical Properties
Ductile
  
Ductile, Malleable, Weldable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Paramagnetic
  
Diamagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
Resistivity
105.40 nΩ·m
  
29
Electrical Conductivity
0.11 106/cm Ω
  
18
0.10 106/cm Ω
  
22
Electron Affinity
106.10 kJ/mol
  
9
54.23 kJ/mol
  
17
Specific Heat
0.13 J/(kg K)
  
39
0.24 J/(kg K)
  
23
Molar Heat Capacity
24.70 J/mol·K
  
99+
25.98 J/mol·K
  
33
Thermal Conductivity
87.60 W/m·K
  
19
71.80 W/m·K
  
23
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
5.10 µm/(m·K)
  
99+
11.80 µm/(m·K)
  
33
Enthalpy
  
  
Enthalpy of Vaporization
627.60 kJ/mol
  
7
376.60 kJ/mol
  
19
Enthalpy of Fusion
29.30 kJ/mol
  
4
16.74 kJ/mol
  
18
Enthalpy of Atomization
669.00 kJ/mol
  
6
393.30 kJ/mol
  
22
Standard Molar Entropy
32.60 J/mol.K
  
99+
37.60 J/mol.K
  
40