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Mendelevium vs Tungsten

Mendelevium
Tungsten
Tungsten vs Mendelevium


Periodic Table
Symbol
Md  
W  
Group Number
3  
15
6  
12
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440111  
99+
7440337  
99+
Space Group Name
-  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
Sources
Bombarding Einsteinium with Helium Ions  
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
-  
Discovery
In 1955  
In 1781  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
28
Abundance In Sun
-  
0.00 %  
23
Abundance In Meteorites
0.00 %  
99+
0.00 %  
39
Abundance In Earth's Crust
-  
0.00 %  
39
Abundance In Oceans
-  
0.00 %  
18
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • Tungsten and its alloys are used in high-temperature applications like welding electrodes, high-temperature furnace, etc.
  • Tungsten carbide is very hard and used in metal working, mining and petroleum industry.
  
Industrial Uses
-  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
31
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
40
Physical
Melting Point
827.00 °C  
99+
3,410.00 °C  
1
Boiling Point
0.00 °C  
99+
5,660.00 °C  
1
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Grayish White  
Luster
Metallic  
Lustrous  
Hardness
  
  
Mohs Hardness
-  
7.50  
2
Brinell Hardness
350.00 MPa  
36
2,000.00 MPa  
4
Vickers Hardness
0.00 MPa  
99+
3,430.00 MPa  
3
Speed of Sound
2,680.00 m/s  
99+
4,620.00 m/s  
20
Optical Properties
  
  
Refractive Index
1.30  
99+
2.10  
11
Reflectivity
66.00 %  
17
62.00 %  
21
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Md  
W  
Isotopes
  
  
Known Isotopes
16  
23
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.36  
3
Sanderson Electronegativity
1.30  
25
0.98  
99+
Allred Rochow Electronegativity
1.20  
28
1.40  
20
Mulliken-Jaffe Electronegativity
1.30  
33
2.36  
3
Allen Electronegativity
1.30  
40
1.47  
33
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.64  
99+
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol  
99+
770.00 kJ/mol  
16
2nd Energy Level
1,235.00 kJ/mol  
99+
1,700.00 kJ/mol  
30
3rd Energy Level
2,470.00 kJ/mol  
99+
2,045.40 kJ/mol  
99+
4th Energy Level
3,840.00 kJ/mol  
99+
7,700.00 kJ/mol  
8
5th Energy Level
6,350.00 kJ/mol  
36
7,700.00 kJ/mol  
17
6th Energy Level
6,350.00 kJ/mol  
99+
7,700.00 kJ/mol  
35
7th Energy level
6,350.00 kJ/mol  
99+
7,700.00 kJ/mol  
29
8th Energy Level
6,350.00 kJ/mol  
99+
7,700.00 kJ/mol  
29
9th Energy Level
6,350.00 kJ/mol  
99+
7,700.00 kJ/mol  
25
10th Energy Level
6,350.00 kJ/mol  
99+
7,700.00 kJ/mol  
29
11th Energy Level
6,400.00 kJ/mol  
99+
7,700.00 kJ/mol  
28
12th Energy Level
60,100.00 kJ/mol  
16
7,700.00 kJ/mol  
99+
13th Energy Level
6,350.00 kJ/mol  
37
7,700.00 kJ/mol  
21
14th Energy Level
1,150.00 kJ/mol  
99+
770.00 kJ/mol  
99+
15th Energy Level
63,500.00 kJ/mol  
37
77,000.00 kJ/mol  
18
16th Energy Level
635.00 kJ/mol  
99+
77,000.00 kJ/mol  
13
17th Energy Level
1,107.00 kJ/mol  
21
770.00 kJ/mol  
34
18th Energy Level
6,350.00 kJ/mol  
39
7,700.00 kJ/mol  
24
19th Energy Level
635.00 kJ/mol  
99+
770.00 kJ/mol  
31
20th Energy Level
635.00 kJ/mol  
40
770.00 kJ/mol  
25
21st Energy Level
6,350.00 kJ/mol  
13
770.00 kJ/mol  
99+
22nd Energy Level
635.00 kJ/mol  
34
770.00 kJ/mol  
19
23rd Energy Level
6,350.00 kJ/mol  
13
770.00 kJ/mol  
99+
24th Energy Level
635.00 kJ/mol  
36
770.00 kJ/mol  
15
25th Energy Level
635.00 kJ/mol  
38
770.00 kJ/mol  
14
26th Energy Level
635.00 kJ/mol  
37
770.00 kJ/mol  
14
27th Energy Level
635.00 kJ/mol  
39
770.00 kJ/mol  
13
28th Energy Level
635.00 kJ/mol  
99+
770.00 kJ/mol  
19
29th Energy Level
635.00 kJ/mol  
99+
770.00 kJ/mol  
19
30th Energy Level
635.00 kJ/mol  
40
770.00 kJ/mol  
14
Electrochemical Equivalent
3.21 g/amp-hr  
13
1.14 g/amp-hr  
99+
Electron Work Function
3.89 eV  
37
4.55 eV  
18
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
101  
17
74  
99+
Electron Configuration
[Rn] 5f13 7s2  
[Xe] 4f14 5d4 6s2  
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
74  
99+
Number of Neutrons
157  
8
110  
28
Number of Electrons
101  
17
74  
99+
Radius of an Atom
  
  
Atomic Radius
175.00 pm  
21
139.00 pm  
99+
Covalent Radius
175.00 pm  
25
162.00 pm  
31
Van der Waals Radius
246.00 pm  
12
200.00 pm  
35
Atomic Weight
258.00 amu  
14
183.84 amu  
37
Atomic Volume
19.90 cm3/mol  
32
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Tantalum
  
Next Element
Nobelium
  
Rhenium
  
Valence Electron Potential
63.70 (-eV)  
23
140.00 (-eV)  
5
Lattice Constant
-  
316.52 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
36
1.29  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.30 g/cm3  
38
19.25 g/cm3  
16
Density When Liquid (at m.p.)
10.30 g/cm3  
39
17.60 g/cm3  
15
Tensile Strength
80.00 MPa  
29
370.00 MPa  
11
Viscosity
0.00  
25
0.00  
1
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)  
99+
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
161.00 GPa  
5
Bulk Modulus
0.00 GPa  
99+
310.00 GPa  
4
Young's Modulus
12.00 GPa  
99+
411.00 GPa  
4
Poisson Ratio
0.30  
14
0.28  
17
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.50  
29
19.22  
18
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
23
Electrical Properties
  
  
Electrical Property
-  
Superconductor  
Resistivity
0.63 nΩ·m  
99+
52.80 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.19 106/cm Ω  
10
Electron Affinity
50.00 kJ/mol  
26
78.60 kJ/mol  
15
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
27.00 J/mol·K  
29
24.27 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
173.00 W/m·K  
7
Critical Temperature
1,100.00 K  
99+
3,695.00 K  
1
Thermal Expansion
11.60 µm/(m·K)  
99+
4.50 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
380.50 kJ/mol  
26
799.10 kJ/mol  
1
Enthalpy of Fusion
-  
35.23 kJ/mol  
1
Enthalpy of Atomization
410.80 kJ/mol  
25
837.00 kJ/mol  
1
Standard Molar Entropy
37.40 J/mol.K  
99+
32.60 J/mol.K  
99+
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