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Pm Element
Promethium


Periodic Table
0
Symbol
Pm 0
Group Number
Not Available 0
Period Number
6 2
Block
f block 0
Element Family
Lanthanide 0
CAS Number
7440122 67
Space Group Name
Not Available 0
Space Group Number
Not Available 0
Facts
0
Interesting Facts
  • Promethium metal found in Pitchblende.
  • Promethium metal is highly radioactive metal.
0
Sources
Found in Minerals, Mining 0
History
0
Who Discovered
Chien Shiung Wu, Emilio Segrè, Hans Bethe 0
Discovery
In 1942 0
Abundance
0
Abundance In Universe
Not Available 0
Abundance In Sun
~-9999 % 0
Abundance In Meteorites
Not Available 0
Abundance In Earth's Crust
Not Available 0
Abundance In Oceans
Not Available 0
Abundance In Humans
Not Available 0
Uses
0
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.
0
Industrial Uses
NA 0
Medical Uses
NA 0
Other Uses
NA 0
Biological Properties
0
Toxicity
Non Toxic 0
Present in Human Body
No 0
In Blood
0.00 Blood/mg dm-3 37
In Bone
Not Available 0
Physical
0
Melting Point
1,042.00 °C 43
Boiling Point
3,000.00 °C 31
Appearance
0
Physical State
Solid 0
Color
Unknown 0
Luster
Metallic 0
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
Not Available 0
Vickers Hardness
Not Available 0
Speed of Sound
Not Available 0
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Pm 0
Isotopes
0
Known Isotopes
27 12
Electronegativity
0
Pauling Electronegativity
Not Available 0
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.07 32
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
Not Available 0
Ionization Energies
0
1st Energy Level
540.00 kJ/mol 73
2nd Energy Level
1,050.00 kJ/mol 78
3rd Energy Level
2,150.00 kJ/mol 67
4th Energy Level
3,970.00 kJ/mol 38
5th Energy Level
Not Available 0
6th Energy Level
Not Available 0
7th Energy level
Not Available 0
8th Energy Level
Not Available 0
9th Energy Level
Not Available 0
10th Energy Level
Not Available 0
11th Energy Level
Not Available 0
12th Energy Level
Not Available 0
13th Energy Level
Not Available 0
14th Energy Level
Not Available 0
15th Energy Level
Not Available 0
16th Energy Level
Not Available 0
17th Energy Level
Not Available 0
18th Energy Level
Not Available 0
19th Energy Level
Not Available 0
20th Energy Level
Not Available 0
21st Energy Level
Not Available 0
22nd Energy Level
Not Available 0
23rd Energy Level
Not Available 0
24th Energy Level
Not Available 0
25th Energy Level
Not Available 0
26th Energy Level
Not Available 0
27th Energy Level
Not Available 0
28th Energy Level
Not Available 0
29th Energy Level
Not Available 0
30th Energy Level
Not Available 0
Electrochemical Equivalent
1.80 g/amp-hr 36
Electron Work Function
Not Available 0
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility 0
Atomic
0
Atomic Number
61 55
Electron Configuration
[Xe] 4f5 6s2 0
Crystal Structure
Double Hexagonal Close Packed (DHCP) 0
Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100 0
Atom
0
Number of Protons
61 54
Number of Neutrons
84 40
Number of Electrons
61 54
Radius of an Atom
0
Atomic Radius
183.00 pm 10
Covalent Radius
199.00 pm 12
Van der Waals Radius
236.00 pm 16
Atomic Weight
145.00 amu 49
Atomic Volume
22.39 cm3/mol 12
Adjacent Atomic Numbers
0
Previous Element
13 0
Next Element
50 0
Valence Electron Potential
44.10 (-eV) 39
Lattice Constant
Not Available 0
Lattice Angles
Unknown 0
Lattice C/A Ratio
Not Available 0
Mechanical
0
Density
0
Density At Room Temperature
7.26 g/cm3 56
Density When Liquid (at m.p.)
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
Vapor Pressure at 2000 K
Not Available 0
Elasticity properties
0
Shear Modulus
18.00 GPa 36
Bulk Modulus
33.00 GPa 36
Young's Modulus
46.00 GPa 38
Poisson Ratio
0.28 17
Other Mechanical Properties
NA 0
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
7.26 43
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
Conductor 0
Resistivity
0.75 nΩ·m 64
Electrical Conductivity
Not Available 0
Electron Affinity
50.00 kJ/mol 21
Thermal
0
Specific Heat
0.18 J/(kg K) 33
Molar Heat Capacity
Not Available 0
Thermal Conductivity
17.90 W/m·K 47
Critical Temperature
Not Available 0
Thermal Expansion
9.00 µm/(m·K) 43
Enthalpy
0
Enthalpy of Vaporization
Not Available 0
Enthalpy of Fusion
7.50 kJ/mol 43
Enthalpy of Atomization
310.00 kJ/mol 34
Standard Molar Entropy
Not Available 0
Summary >>
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