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Mendelevium vs Dubnium

Mendelevium
Dubnium
Dubnium vs Mendelevium


Periodic Table
Symbol
Md   
Db   
Group Number
Not Available   
5   
13
Period Number
7   
7   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440111   
99+
53850354   
14
Space Group Name
Not Available   
Not Available   
Space Group Number
Not Available   
Not Available   
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
Sources
Bombarding Einsteinium with Helium Ions   
Produced by Bombarding Am243 with Ne22, Synthetically Produced   
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory   
Joint Institute for Nuclear Research   
Discovery
In 1955   
In 1968   
Abundance
  
  
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • Currently known uses of Dubnium metal are limited to research purpose only.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
NA   
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
Physical Properties
Melting Point
827.00 °C   
99+
Not Available   
Boiling Point
Not Available   
Not Available   
Appearance
  
  
Physical State
Solid   
Solid   
Luster
Metallic   
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 Properties
Chemical Formula
Md   
Db   
Isotopes
  
  
Known Isotopes
16   
23
10   
28
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
Not Available   
Allred Rochow Electronegativity
1.20   
27
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
Not Available   
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol   
99+
664.80 kJ/mol   
38
2nd Energy Level
1,235.00 kJ/mol   
99+
1,546.70 kJ/mol   
38
3rd Energy Level
2,470.00 kJ/mol   
99+
2,378.40 kJ/mol   
99+
4th Energy Level
3,840.00 kJ/mol   
99+
3,298.80 kJ/mol   
99+
5th Energy Level
Not Available   
4,305.20 kJ/mol   
39
Electrochemical Equivalent
3.21 g/amp-hr   
12
Not Available   
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
101   
17
105   
13
Electron Configuration
[Rn] 5f13 7s2   
[Rn] 5f14 6d3 7s2   
Crystal Structure
Not Known   
Body Centered Cubic (BCC)   
Crystal Lattice
Unknown-Crystal-Structure-of-Mendelevium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
101   
17
105   
13
Number of Neutrons
157   
7
157   
7
Number of Electrons
101   
17
105   
13
Radius of an Atom
  
  
Atomic Radius
Not Available   
139.00 pm   
39
Covalent Radius
Not Available   
149.00 pm   
35
Van der Waals Radius
246.00 pm   
8
Not Available   
Atomic Weight
258.00 amu   
14
268.00 amu   
10
Atomic Volume
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Rutherfordium
  
Next Element
Nobelium
  
Seaborgium
  
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   
Mechanical Properties
Density
  
  
Density At Room Temperature
Not Available   
29.30 g/cm3   
5
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 Properties
Magnetic Characteristics
  
  
Electrical Properties
  
  
Thermal 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   
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