Symbol
Ds
  
Pm
  
Group Number
Not Available
  
Period Number
7
  
6
  
Block
d block
  
f block
  
Element Family
Probably Transition
  
Lanthanide
  
Space Group Name
Not Available
  
Not Available
  
Space Group Number
Not Available
  
Not Available
  
Interesting Facts
Not Available
  
- Promethium metal found in Pitchblende.
- Promethium metal is highly radioactive metal.
  
Sources
Synthetically Produced
  
Found in Minerals, Mining
  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung
  
Chien Shiung Wu, Emilio Segrè, Hans Bethe
  
Discovery
In 1994
  
In 1942
  
Abundance
  
  
Uses & Benefits
- Currently known uses of Darmstadtium metal are limited to research purpose only. As only few atoms of this metal are produced.
  
- 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
NA
  
NA
  
Medical Uses
NA
  
NA
  
Other Uses
Research Purposes
  
NA
  
Biological Properties
  
  
Toxicity
Unknown
  
Non Toxic
  
Present in Human Body
No
  
No
  
In Blood
0.00 Blood/mg dm-3
  
37
0.00 Blood/mg dm-3
  
37
In Bone
0.00 p.p.m.
  
36
Not Available
  
Melting Point
Not Available
  
1,042.00 °C
  
99+
Boiling Point
Not Available
  
3,000.00 °C
  
31
Appearance
  
  
Physical State
Solid
  
Solid
  
Luster
Unknown Luster
  
Metallic
  
Hardness
  
  
Speed of Sound
5,090.00 m/s
  
9
Not Available
  
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Ds
  
Pm
  
Isotopes
  
  
Electronegativity
  
  
Allred Rochow Electronegativity
Not Available
  
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
955.20 kJ/mol
  
5
540.00 kJ/mol
  
99+
2nd Energy Level
1,891.10 kJ/mol
  
16
1,050.00 kJ/mol
  
99+
3rd Energy Level
3,029.60 kJ/mol
  
25
2,150.00 kJ/mol
  
99+
4th Energy Level
3,955.90 kJ/mol
  
40
3,970.00 kJ/mol
  
38
5th Energy Level
5,113.70 kJ/mol
  
33
Not Available
  
Electrochemical Equivalent
Not Available
  
1.80 g/amp-hr
  
36
Electron Work Function
Not Available
  
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
  
Ionization, Radioactive Isotopes, Solubility
  
Electron Configuration
[Rn] 5f14 6d8 7s2
  
[Xe] 4f5 6s2
  
Crystal Structure
Body Centered Cubic (BCC)
  
Double Hexagonal Close Packed (DHCP)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
DHCP-Crystal-Structure-of-Promethium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Van der Waals Radius
Not Available
  
Atomic Weight
145.00 amu
  
99+
Atomic Volume
Not Available
  
22.39 cm3/mol
  
12
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
44.10 (-eV)
  
39
Lattice Constant
Not Available
  
Not Available
  
Lattice Angles
NA
  
Unknown
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
Not Available
  
7.26 g/cm
3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
Unknown
  
NA
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Unknown
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Conductor
  
Resistivity
Not Available
  
Electron Affinity
Not Available
  
50.00 kJ/mol
  
21
Specific Heat
Not Available
  
0.18 J/(kg K)
  
33
Molar Heat Capacity
Not Available
  
Not Available
  
Thermal Conductivity
Not Available
  
17.90 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
9.00 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Fusion
Not Available
  
7.50 kJ/mol
  
99+
Enthalpy of Atomization
Not Available
  
310.00 kJ/mol
  
34
Standard Molar Entropy
Not Available
  
Not Available