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Platinum Promethium Comparison

Platinum
Promethium
Promethium Platinum comparison


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