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Mendelevium vs Rhenium

Mendelevium
Rhenium
Rhenium vs Mendelevium


Periodic Table
Symbol
Md  
Re  
Group Number
3  
15
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
-  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
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
0.00 %  
40
0.00 %  
30
Abundance In Sun
-  
0.00 %  
29
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
34
Abundance In Humans
0.00 %  
24
0.00 %  
24
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
-  
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Low Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
827.00 °C  
99+
3,180.00 °C  
2
Boiling Point
0.00 °C  
99+
5,627.00 °C  
2
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silvery Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
-  
7.00  
3
Brinell Hardness
350.00 MPa  
36
1,320.00 MPa  
8
Vickers Hardness
0.00 MPa  
99+
1,350.00 MPa  
12
Speed of Sound
2,680.00 m/s  
99+
4,700.00 m/s  
19
Optical Properties
  
  
Refractive Index
1.30  
99+
1.90  
18
Reflectivity
66.00 %  
17
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Md  
Re  
Isotopes
  
  
Known Isotopes
16  
23
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.90  
12
Sanderson Electronegativity
1.30  
25
1.90  
13
Allred Rochow Electronegativity
1.20  
28
1.46  
16
Mulliken-Jaffe Electronegativity
1.30  
33
1.90  
13
Allen Electronegativity
1.30  
40
1.60  
24
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+
5th Energy Level
6,350.00 kJ/mol  
36
7,600.00 kJ/mol  
20
6th Energy Level
6,350.00 kJ/mol  
99+
7,600.00 kJ/mol  
37
7th Energy level
6,350.00 kJ/mol  
99+
7,600.00 kJ/mol  
31
8th Energy Level
6,350.00 kJ/mol  
99+
5,560.00 kJ/mol  
99+
9th Energy Level
6,350.00 kJ/mol  
99+
5,560.00 kJ/mol  
99+
10th Energy Level
6,350.00 kJ/mol  
99+
7,600.00 kJ/mol  
31
11th Energy Level
6,400.00 kJ/mol  
99+
7,600.00 kJ/mol  
30
12th Energy Level
60,100.00 kJ/mol  
16
7,600.00 kJ/mol  
99+
13th Energy Level
6,350.00 kJ/mol  
37
7,600.00 kJ/mol  
23
14th Energy Level
1,150.00 kJ/mol  
99+
7,600.00 kJ/mol  
20
15th Energy Level
63,500.00 kJ/mol  
37
76,000.00 kJ/mol  
20
16th Energy Level
635.00 kJ/mol  
99+
76,000.00 kJ/mol  
15
17th Energy Level
1,107.00 kJ/mol  
21
760.10 kJ/mol  
36
18th Energy Level
6,350.00 kJ/mol  
39
7,600.00 kJ/mol  
26
19th Energy Level
635.00 kJ/mol  
99+
760.40 kJ/mol  
33
20th Energy Level
635.00 kJ/mol  
40
760.00 kJ/mol  
27
21st Energy Level
6,350.00 kJ/mol  
13
760.00 kJ/mol  
99+
22nd Energy Level
635.00 kJ/mol  
34
760.00 kJ/mol  
21
23rd Energy Level
6,350.00 kJ/mol  
13
760.00 kJ/mol  
99+
24th Energy Level
635.00 kJ/mol  
36
760.00 kJ/mol  
18
25th Energy Level
635.00 kJ/mol  
38
760.00 kJ/mol  
18
26th Energy Level
635.00 kJ/mol  
37
760.00 kJ/mol  
18
27th Energy Level
635.00 kJ/mol  
39
760.00 kJ/mol  
17
28th Energy Level
635.00 kJ/mol  
99+
760.00 kJ/mol  
23
29th Energy Level
635.00 kJ/mol  
99+
760.00 kJ/mol  
24
30th Energy Level
635.00 kJ/mol  
40
760.00 kJ/mol  
18
Electrochemical Equivalent
3.21 g/amp-hr  
13
0.99 g/amp-hr  
99+
Electron Work Function
3.89 eV  
37
4.96 eV  
11
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
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  
8
111  
27
Number of Electrons
101  
17
75  
40
Radius of an Atom
  
  
Atomic Radius
175.00 pm  
21
137.00 pm  
99+
Covalent Radius
175.00 pm  
25
151.00 pm  
36
Van der Waals Radius
246.00 pm  
12
200.00 pm  
35
Atomic Weight
258.00 amu  
14
186.21 amu  
36
Atomic Volume
19.90 cm3/mol  
32
8.85 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Tungsten
  
Next Element
Nobelium
  
Osmium
  
Valence Electron Potential
63.70 (-eV)  
23
180.00 (-eV)  
3
Lattice Constant
-  
276.10 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.58  
36
1.62  
17
Mechanical
Density
  
  
Density At Room Temperature
10.30 g/cm3  
38
21.02 g/cm3  
12
Density When Liquid (at m.p.)
10.30 g/cm3  
39
18.90 g/cm3  
14
Tensile Strength
80.00 MPa  
29
1,070.00 MPa  
3
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
40
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
178.00 GPa  
3
Bulk Modulus
0.00 GPa  
99+
370.00 GPa  
2
Young's Modulus
12.00 GPa  
99+
463.00 GPa  
2
Poisson Ratio
0.30  
14
0.30  
14
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.50  
29
21.02  
14
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
8
Susceptibility
0.00  
24
0.00  
26
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.63 nΩ·m  
99+
193.00 nΩ·m  
20
Electrical Conductivity
0.00 106/cm Ω  
99+
0.05 106/cm Ω  
38
Electron Affinity
50.00 kJ/mol  
26
14.50 kJ/mol  
99+
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
27.00 J/mol·K  
29
25.48 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
48.00 W/m·K  
31
Critical Temperature
1,100.00 K  
99+
3,459.00 K  
2
Thermal Expansion
11.60 µm/(m·K)  
99+
6.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
380.50 kJ/mol  
26
707.10 kJ/mol  
4
Enthalpy of Fusion
-  
33.05 kJ/mol  
2
Enthalpy of Atomization
410.80 kJ/mol  
25
791.00 kJ/mol  
2
Standard Molar Entropy
37.40 J/mol.K  
99+
36.90 J/mol.K  
99+
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