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Promethium vs Platinum

Promethium
Platinum
Platinum vs Promethium


Periodic Table
Symbol
Pm   
Pt   
Group Number
Not Available   
10   
8
Period Number
6   
6   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7440122   
99+
7440064   
99+
Space Group Name
Not Available   
Fm_ 3m   
Space Group Number
Not Available   
225.00   
2
Facts
Interesting Facts
  • Promethium metal found in Pitchblende.
  • Promethium metal is highly radioactive metal.
  
  • Platinum is the rarest metal from the Precious metal categories..
  • Commercially Platinum is produced as a byproduct in ores of nickel.
  
Sources
Found in Minerals, Mining   
Mining, Ores of metals, Ores of Minerals   
History
  
  
Who Discovered
Chien Shiung Wu, Emilio Segrè, Hans Bethe   
Antonio de Ulloa   
Discovery
In 1942   
In 1735   
Abundance
  
  
Abundance In Universe
Not Available   
5 * 10-7 %   
19
Abundance In Sun
~-9999 %   
~0.0000009 %   
19
Abundance In Meteorites
Not Available   
0.00 %   
25
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Uses
Uses & Benefits
  • It is used for research purpose. Very small amount of this metal is used in atomic batteries.
  • Its radioactive decay is used for a phosphor to give off light. The light emitted is converted into electricity.
  
  • Platinum metal is mainly used in jewellery.
  • Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
  
Industrial Uses
NA   
Aerospace Industry, Chemical Industry   
Medical Uses
NA   
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing   
Other Uses
NA   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Non Toxic   
Non Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
Not Available   
Physical Properties
Melting Point
1,042.00 °C   
99+
1,772.00 °C   
16
Boiling Point
3,000.00 °C   
31
3,827.00 °C   
15
Appearance
  
  
Physical State
Solid   
Solid   
Color
Unknown   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
3.50   
11
Brinell Hardness
Not Available   
300.00 MPa   
34
Vickers Hardness
Not Available   
400.00 MPa   
25
Speed of Sound
Not Available   
2,800.00 m/s   
29
Optical Properties
  
  
Reflectivity
Not Available   
73.00 %   
8
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
Pm   
Pt   
Isotopes
  
  
Known Isotopes
27   
12
35   
4
Electronegativity
  
  
Pauling Electronegativity
Not Available   
2.28   
3
Allred Rochow Electronegativity
1.07   
32
1.44   
17
Allen Electronegativity
Not Available   
1.72   
16
Electropositivity
  
  
Pauling Electropositivity
Not Available   
1.72   
99+
Ionization Energies
  
  
1st Energy Level
540.00 kJ/mol   
99+
870.00 kJ/mol   
10
2nd Energy Level
1,050.00 kJ/mol   
99+
1,791.00 kJ/mol   
21
3rd Energy Level
2,150.00 kJ/mol   
99+
Not Available   
4th Energy Level
3,970.00 kJ/mol   
38
Not Available   
Electrochemical Equivalent
1.80 g/amp-hr   
36
1.82 g/amp-hr   
35
Electron Work Function
Not Available   
5.65 eV   
1
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Chemical Stability, Anti Corrosion, Ionization   
Atomic Properties
Atomic Number
61   
99+
78   
38
Electron Configuration
[Xe] 4f5 6s2   
[Xe] 4f14 5d9 6s1   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Face Centered Cubic (FCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100   
FCC-Crystal-Structure-of-Platinum.jpg#100   
Atom
  
  
Number of Protons
61   
99+
78   
38
Number of Neutrons
84   
40
117   
24
Number of Electrons
61   
99+
78   
38
Radius of an Atom
  
  
Atomic Radius
183.00 pm   
10
139.00 pm   
39
Covalent Radius
199.00 pm   
12
136.00 pm   
99+
Van der Waals Radius
236.00 pm   
16
175.00 pm   
36
Atomic Weight
145.00 amu   
99+
47.87 amu   
99+
Atomic Volume
22.39 cm3/mol   
12
9.09 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Neodymium
  
Iridium
  
Next Element
Samarium
  
Gold
  
Valence Electron Potential
44.10 (-eV)   
39
392.42 (-eV)   
1
Lattice Constant
Not Available   
392.42 pm   
24
Lattice Angles
Unknown   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
7.26 g/cm3   
99+
21.45 g/cm3   
11
Density When Liquid (at m.p.)
Not Available   
19.77 g/cm3   
2
Tensile Strength
Not Available   
125.00 MPa   
14
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.07 (Pa)   
18
Elasticity properties
  
  
Shear Modulus
18.00 GPa   
36
61.00 GPa   
14
Bulk Modulus
33.00 GPa   
36
230.00 GPa   
6
Young's Modulus
46.00 GPa   
38
168.00 GPa   
14
Poisson Ratio
0.28   
17
0.38   
6
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.26   
99+
21.45   
4
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Permeability
Not Available   
0.00 H/m   
3
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
0.75 nΩ·m   
99+
105.00 nΩ·m   
30
Electrical Conductivity
Not Available   
0.10 106/cm Ω   
21
Electron Affinity
50.00 kJ/mol   
21
205.30 kJ/mol   
2
Thermal Properties
Specific Heat
0.18 J/(kg K)   
33
0.13 J/(kg K)   
39
Molar Heat Capacity
Not Available   
25.86 J/mol·K   
35
Thermal Conductivity
17.90 W/m·K   
99+
71.60 W/m·K   
24
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
9.00 µm/(m·K)   
99+
8.80 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
510.50 kJ/mol   
11
Enthalpy of Fusion
7.50 kJ/mol   
99+
19.70 kJ/mol   
12
Enthalpy of Atomization
310.00 kJ/mol   
34
565.00 kJ/mol   
11
Standard Molar Entropy
Not Available   
41.60 J/mol.K   
36
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