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Mendelevium vs Rhenium

Mendelevium
Rhenium
Rhenium vs Mendelevium


Periodic Table
Symbol
Md   
Re   
Group Number
Not Available   
7   
11
Period Number
7   
6   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440111   
99+
7440155   
99+
Space Group Name
Not Available   
P63/mmc   
Space Group Number
Not Available   
194.00   
5
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
  • Chemical properties of Rhenium are similar to Manganese.
  • Rhenium metal is created while refining Molybdenum.
  
Sources
Bombarding Einsteinium with Helium Ions   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory   
Masataka Ogawa   
Discovery
In 1955   
In 1908   
Abundance
  
  
Abundance In Universe
Not Available   
2 * 10-8 %   
29
Abundance In Sun
~-9999 %   
~0.00000001 %   
29
Abundance In Meteorites
Not Available   
0.00 %   
99+
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
34
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • Alloys of Rhenium are used as an electric contact material. It can resist withstand arc corrosion.
  • Its catalysts are used in hydrogenation of fine chemicals. Its Alloy with nickel is used to produce turbine blades.
  
Industrial Uses
NA   
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
NA   
Alloys   
Biological Properties
  
  
Toxicity
Unknown   
Low Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
Not Available   
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
827.00 °C   
99+
3,180.00 °C   
2
Boiling Point
Not Available   
5,627.00 °C   
2
Appearance
  
  
Physical State
Solid   
Solid   
Color
Unknown   
Silvery Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
7.00   
3
Brinell Hardness
Not Available   
1,320.00 MPa   
8
Vickers Hardness
Not Available   
1,350.00 MPa   
7
Speed of Sound
Not Available   
4,700.00 m/s   
15
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   
Re   
Isotopes
  
  
Known Isotopes
16   
23
33   
6
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
1.90   
11
Allred Rochow Electronegativity
1.20   
27
1.46   
15
Allen Electronegativity
Not Available   
1.60   
21
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
2.10   
99+
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol   
99+
760.00 kJ/mol   
20
2nd Energy Level
1,235.00 kJ/mol   
99+
1,260.00 kJ/mol   
99+
3rd Energy Level
2,470.00 kJ/mol   
99+
2,510.00 kJ/mol   
99+
4th Energy Level
3,840.00 kJ/mol   
99+
3,640.00 kJ/mol   
99+
Electrochemical Equivalent
3.21 g/amp-hr   
12
0.99 g/amp-hr   
99+
Electron Work Function
Not Available   
4.96 eV   
7
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
101   
17
75   
99+
Electron Configuration
[Rn] 5f13 7s2   
[Xe] 4f14 5d5 6s2   
Crystal Structure
Not Known   
Hexagonal Close Packed (HCP)   
Crystal Lattice
Unknown-Crystal-Structure-of-Mendelevium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
101   
17
75   
40
Number of Neutrons
157   
7
111   
26
Number of Electrons
101   
17
75   
40
Radius of an Atom
  
  
Atomic Radius
Not Available   
137.00 pm   
40
Covalent Radius
Not Available   
151.00 pm   
34
Van der Waals Radius
246.00 pm   
8
200.00 pm   
28
Atomic Weight
258.00 amu   
14
186.21 amu   
36
Atomic Volume
Not Available   
8.85 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Tungsten
  
Next Element
Nobelium
  
Osmium
  
Valence Electron Potential
Not Available   
180.00 (-eV)   
3
Lattice Constant
Not Available   
276.10 pm   
99+
Lattice Angles
NA   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.62   
3
Mechanical Properties
Density
  
  
Density At Room Temperature
Not Available   
21.02 g/cm3   
12
Density When Liquid (at m.p.)
Not Available   
18.90 g/cm3   
4
Tensile Strength
Not Available   
1,070.00 MPa   
3
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
29
Elasticity properties
  
  
Shear Modulus
Not Available   
178.00 GPa   
3
Bulk Modulus
Not Available   
370.00 GPa   
2
Young's Modulus
Not Available   
463.00 GPa   
2
Poisson Ratio
Not Available   
0.30   
14
Other Mechanical Properties
Unknown   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
21.02   
5
Magnetic Ordering
Unknown   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Conductor   
Resistivity
Not Available   
193.00 nΩ·m   
20
Electrical Conductivity
Not Available   
0.05 106/cm Ω   
33
Electron Affinity
Not Available   
14.50 kJ/mol   
35
Thermal Properties
Specific Heat
Not Available   
0.13 J/(kg K)   
39
Molar Heat Capacity
Not Available   
25.48 J/mol·K   
38
Thermal Conductivity
Not Available   
48.00 W/m·K   
31
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
6.20 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
707.10 kJ/mol   
3
Enthalpy of Fusion
Not Available   
33.05 kJ/mol   
2
Enthalpy of Atomization
Not Available   
791.00 kJ/mol   
2
Standard Molar Entropy
Not Available   
36.90 J/mol.K   
99+
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