Symbol
Db
  
Cm
  
Group Number
Not Available
  
Period Number
7
  
7
  
Block
d block
  
f block
  
Element Family
Transition Metal
  
Actinide
  
Space Group Name
Not Available
  
Not Available
  
Space Group Number
Not Available
  
Not Available
  
Interesting Facts
- IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
- In the production of Dubnium, thermal gradient chromatography is used.
  
- Curium metal does not occur free in nature.
- Curium metal is a synthetically produced metal.
  
Sources
Produced by Bombarding Am243 with Ne22, Synthetically Produced
  
Bombarding Plutonium with Helium Ions
  
History
  
  
Who Discovered
Joint Institute for Nuclear Research
  
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
  
Discovery
In 1968
  
In 1944
  
Abundance
  
  
Uses & Benefits
- Currently known uses of Dubnium metal are limited to research purpose only.
  
- Curium metal is used to provide power to electrical equipment for space missions.
  
Industrial Uses
NA
  
NA
  
Medical Uses
NA
  
NA
  
Other Uses
Research Purposes
  
Research Purposes
  
Biological Properties
  
  
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
0.00 p.p.m.
  
36
Melting Point
Not Available
  
1,340.00 °C
  
34
Boiling Point
Not Available
  
3,110.00 °C
  
30
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Unknown
  
Silver
  
Luster
Unknown Luster
  
Metallic
  
Hardness
  
  
Speed of Sound
Not Available
  
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
Db
  
Cm
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Not Available
  
Allred Rochow Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
664.80 kJ/mol
  
38
581.00 kJ/mol
  
99+
2nd Energy Level
1,546.70 kJ/mol
  
38
1,196.00 kJ/mol
  
99+
3rd Energy Level
2,378.40 kJ/mol
  
99+
2,026.00 kJ/mol
  
99+
4th Energy Level
3,298.80 kJ/mol
  
99+
3,550.00 kJ/mol
  
99+
5th Energy Level
4,305.20 kJ/mol
  
39
Not Available
  
Electrochemical Equivalent
Not Available
  
3.07 g/amp-hr
  
16
Electron Work Function
Not Available
  
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
  
Ionization, Radioactive Isotopes
  
Electron Configuration
[Rn] 5f14 6d3 7s2
  
[Rn] 5f7 6d1 7s2
  
Crystal Structure
Body Centered Cubic (BCC)
  
Double Hexagonal Close Packed (DHCP)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
DHCP-Crystal-Structure-of-Curium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Van der Waals Radius
Not Available
  
Atomic Volume
Not Available
  
18.28 cm3/mol
  
26
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
44.50 (-eV)
  
38
Lattice Constant
Not Available
  
Not Available
  
Lattice Angles
NA
  
NA
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
13.51 g/cm3
  
25
Density When Liquid (at m.p.)
Not Available
  
13.85 g/cm3
  
10
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Poisson Ratio
Not Available
  
Not Available
  
Other Mechanical Properties
Unknown
  
Unknown
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Unknown
  
Antiferromagnetic
  
Electrical Properties
  
  
Resistivity
Not Available
  
Specific Heat
Not Available
  
Not Available
  
Molar Heat Capacity
Not Available
  
Not Available
  
Thermal Conductivity
Not Available
  
Not Available
  
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
Not Available
  
Enthalpy
  
  
Enthalpy of Fusion
Not Available
  
15.00 kJ/mol
  
21
Standard Molar Entropy
Not Available
  
Not Available