Promethium vs Platinum
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
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
|
||
|
||
|
