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Mendelevium vs Molybdenum

Mendelevium
Molybdenum
Molybdenum vs Mendelevium


Periodic Table
Symbol
Md  
Mo  
Group Number
3  
15
6  
12
Period Number
7  
5  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440111  
99+
7439987  
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.
  
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
Sources
Bombarding Einsteinium with Helium Ions  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Carl Wilhelm Scheele  
Discovery
In 1955  
In 1778  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
20
Abundance In Sun
-  
0.00 %  
19
Abundance In Meteorites
0.00 %  
99+
0.00 %  
24
Abundance In Earth's Crust
-  
0.00 %  
39
Abundance In Oceans
-  
0.00 %  
9
Abundance In Humans
0.00 %  
24
0.00 %  
17
Uses
Uses & Benefits
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
  • Its alloys are used to make engine parts, drills, saw blade, etc.
  • Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.
  
Industrial Uses
-  
Aerospace Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
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+
0.70 p.p.m.  
20
Physical
Melting Point
827.00 °C  
99+
2,617.00 °C  
5
Boiling Point
0.00 °C  
99+
4,612.00 °C  
9
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
-  
5.50  
7
Brinell Hardness
350.00 MPa  
36
1,370.00 MPa  
7
Vickers Hardness
0.00 MPa  
99+
1,400.00 MPa  
11
Speed of Sound
2,680.00 m/s  
99+
5,400.00 m/s  
9
Optical Properties
  
  
Refractive Index
1.30  
99+
2.00  
15
Reflectivity
66.00 %  
17
58.00 %  
25
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Md  
Mo  
Isotopes
  
  
Known Isotopes
16  
23
25  
14
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.16  
6
Sanderson Electronegativity
1.30  
25
1.15  
34
Allred Rochow Electronegativity
1.20  
28
1.30  
25
Mulliken-Jaffe Electronegativity
1.30  
33
2.16  
7
Allen Electronegativity
1.30  
40
2.16  
3
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.84  
99+
Ionization Energies
  
  
1st Energy Level
635.00 kJ/mol  
99+
684.30 kJ/mol  
37
2nd Energy Level
1,235.00 kJ/mol  
99+
1,560.00 kJ/mol  
38
3rd Energy Level
2,470.00 kJ/mol  
99+
2,618.00 kJ/mol  
99+
4th Energy Level
3,840.00 kJ/mol  
99+
4,480.00 kJ/mol  
36
5th Energy Level
6,350.00 kJ/mol  
36
5,257.00 kJ/mol  
99+
6th Energy Level
6,350.00 kJ/mol  
99+
6,640.80 kJ/mol  
99+
7th Energy level
6,350.00 kJ/mol  
99+
12,125.00 kJ/mol  
13
8th Energy Level
6,350.00 kJ/mol  
99+
13,860.00 kJ/mol  
16
9th Energy Level
6,350.00 kJ/mol  
99+
15,835.00 kJ/mol  
16
10th Energy Level
6,350.00 kJ/mol  
99+
17,980.00 kJ/mol  
18
11th Energy Level
6,400.00 kJ/mol  
99+
20,190.00 kJ/mol  
17
12th Energy Level
60,100.00 kJ/mol  
16
22,219.00 kJ/mol  
38
13th Energy Level
6,350.00 kJ/mol  
37
26,930.00 kJ/mol  
13
14th Energy Level
1,150.00 kJ/mol  
99+
29,196.00 kJ/mol  
13
15th Energy Level
63,500.00 kJ/mol  
37
52,490.00 kJ/mol  
99+
16th Energy Level
635.00 kJ/mol  
99+
55,000.00 kJ/mol  
99+
17th Energy Level
1,107.00 kJ/mol  
21
61,400.00 kJ/mol  
9
18th Energy Level
6,350.00 kJ/mol  
39
67,700.00 kJ/mol  
9
19th Energy Level
635.00 kJ/mol  
99+
74,000.00 kJ/mol  
9
20th Energy Level
635.00 kJ/mol  
40
80,400.00 kJ/mol  
10
21st Energy Level
6,350.00 kJ/mol  
13
87,000.00 kJ/mol  
9
22nd Energy Level
635.00 kJ/mol  
34
93,400.00 kJ/mol  
7
23rd Energy Level
6,350.00 kJ/mol  
13
98,420.00 kJ/mol  
6
24th Energy Level
635.00 kJ/mol  
36
104,400.00 kJ/mol  
2
25th Energy Level
635.00 kJ/mol  
38
121,900.00 kJ/mol  
1
26th Energy Level
635.00 kJ/mol  
37
127,700.00 kJ/mol  
1
27th Energy Level
635.00 kJ/mol  
39
133,800.00 kJ/mol  
1
28th Energy Level
635.00 kJ/mol  
99+
139,800.00 kJ/mol  
1
29th Energy Level
635.00 kJ/mol  
99+
148,100.00 kJ/mol  
1
30th Energy Level
635.00 kJ/mol  
40
154,500.00 kJ/mol  
1
Electrochemical Equivalent
3.21 g/amp-hr  
13
0.89 g/amp-hr  
99+
Electron Work Function
3.89 eV  
37
4.60 eV  
17
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
101  
17
42  
99+
Electron Configuration
[Rn] 5f13 7s2  
[Kr] 4d5 5s1  
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
42  
99+
Number of Neutrons
157  
8
54  
99+
Number of Electrons
101  
17
42  
99+
Radius of an Atom
  
  
Atomic Radius
175.00 pm  
21
139.00 pm  
99+
Covalent Radius
175.00 pm  
25
154.00 pm  
34
Van der Waals Radius
246.00 pm  
12
200.00 pm  
35
Atomic Weight
258.00 amu  
14
95.95 amu  
99+
Atomic Volume
19.90 cm3/mol  
32
9.40 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Fermium
  
Niobium
  
Next Element
Nobelium
  
Technetium
  
Valence Electron Potential
63.70 (-eV)  
23
88.60 (-eV)  
13
Lattice Constant
-  
314.70 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
36
1.03  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.30 g/cm3  
38
10.28 g/cm3  
39
Density When Liquid (at m.p.)
10.30 g/cm3  
39
9.33 g/cm3  
99+
Tensile Strength
80.00 MPa  
29
324.00 MPa  
15
Viscosity
0.00  
25
0.00  
5
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
27
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
126.00 GPa  
8
Bulk Modulus
0.00 GPa  
99+
230.00 GPa  
6
Young's Modulus
12.00 GPa  
99+
329.00 GPa  
6
Poisson Ratio
0.30  
14
0.31  
13
Other Mechanical Properties
-  
Ductile, Weldable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.50  
29
10.22  
40
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
29
Electrical Properties
  
  
Electrical Property
-  
Semiconductor  
Resistivity
0.63 nΩ·m  
99+
53.40 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.19 106/cm Ω  
11
Electron Affinity
50.00 kJ/mol  
26
71.90 kJ/mol  
16
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.25 J/(kg K)  
21
Molar Heat Capacity
27.00 J/mol·K  
29
24.06 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
138.00 W/m·K  
12
Critical Temperature
1,100.00 K  
99+
2,896.00 K  
6
Thermal Expansion
11.60 µm/(m·K)  
99+
4.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
380.50 kJ/mol  
26
594.10 kJ/mol  
9
Enthalpy of Fusion
-  
27.61 kJ/mol  
5
Enthalpy of Atomization
410.80 kJ/mol  
25
653.00 kJ/mol  
7
Standard Molar Entropy
37.40 J/mol.K  
99+
28.70 J/mol.K  
99+
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