Symbol
Db
  
Rf
  
Period Number
7
  
7
  
Block
d block
  
d block
  
Element Family
Transition Metal
  
Transition Metal
  
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.
  
- Rutherfordium does not occur in nature as it is a synthetic element.
- Till date Rutherfordium metal has 15 radioisotopes created synthetically.
  
Sources
Produced by Bombarding Am243 with Ne22, Synthetically Produced
  
Bombarding Plutonium with Accelerated 113 to 115 MeV Neon Ions, Synthetically Produced
  
History
  
  
Who Discovered
Joint Institute for Nuclear Research
  
Joint Institute for Nuclear Research
  
Discovery
In 1968
  
In 1964
  
Abundance
  
  
Uses & Benefits
- Currently known uses of Dubnium metal are limited to research purpose only.
  
- Currently known uses of Rutherfordium metal are limited to research purpose only.
  
Industrial Uses
NA
  
NA
  
Medical Uses
NA
  
NA
  
Other Uses
Research Purposes
  
Alloys, 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
  
2,100.00 °C
  
11
Boiling Point
Not Available
  
Appearance
  
  
Physical State
Solid
  
Solid
  
Luster
Unknown Luster
  
Unknown Luster
  
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
  
Rf
  
Isotopes
  
  
Electronegativity
  
  
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
664.80 kJ/mol
  
38
579.90 kJ/mol
  
99+
2nd Energy Level
1,546.70 kJ/mol
  
38
1,389.40 kJ/mol
  
99+
3rd Energy Level
2,378.40 kJ/mol
  
99+
2,296.40 kJ/mol
  
99+
4th Energy Level
3,298.80 kJ/mol
  
99+
3,077.90 kJ/mol
  
99+
5th Energy Level
4,305.20 kJ/mol
  
39
Not Available
  
Electrochemical Equivalent
Not Available
  
Not Available
  
Electron Work Function
Not Available
  
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
  
Ionization, Radioactive Isotopes, Radioactivity
  
Electron Configuration
[Rn] 5f14 6d3 7s2
  
[Rn] 5f14 6d2 7s2
  
Crystal Structure
Body Centered Cubic (BCC)
  
Hexagonal Close Packed (HCP)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
Not Available
  
Not Available
  
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
Not Available
  
Lattice Constant
Not Available
  
Not Available
  
Lattice Angles
NA
  
NA
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
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
  
  
Electrical Properties
  
  
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
  
  
Standard Molar Entropy
Not Available
  
Not Available