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Mendelevium vs Molybdenum


Molybdenum vs Mendelevium


Periodic Table

Symbol
Md   
Mo   

Group Number
Not Available   
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
Not Available   
Im_ 3m   

Space Group Number
Not Available   
229.00   
1

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
Not Available   
5 * 10-7 %   
19

Abundance In Sun
~-9999 %   
~0.0000009 %   
19

Abundance In Meteorites
Not Available   
0.00 %   
24

Abundance In Earth's Crust
Not Available   
0.00 %   
39

Abundance In Oceans
Not Available   
0.00 %   
9

Abundance In Humans
Not Available   
0.00 %   
14

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
NA   
Aerospace Industry, Electrical Industry, Electronic Industry   

Medical Uses
NA   
NA   

Other Uses
NA   
Alloys   

Biological Properties
  
  

Toxicity
Unknown   
Toxic   

Present in Human Body
No   
Yes   

In Blood
0.00 Blood/mg dm-3   
37
0.00 Blood/mg dm-3   
31

In Bone
0.00 p.p.m.   
36
0.70 p.p.m.   
18

Physical Properties

Melting Point
827.00 °C   
99+
2,617.00 °C   
5

Boiling Point
Not Available   
4,612.00 °C   
9

Appearance
  
  

Physical State
Solid   
Solid   

Color
Unknown   
Gray   

Luster
Metallic   
Metallic   

Hardness
  
  

Mohs Hardness
Not Available   
5.50   
7

Brinell Hardness
Not Available   
1,370.00 MPa   
7

Vickers Hardness
Not Available   
1,400.00 MPa   
6

Speed of Sound
Not Available   
5,400.00 m/s   
6

Optical Properties
  
  

Reflectivity
Not Available   
58.00 %   
15

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   
Mo   

Isotopes
  
  

Known Isotopes
16   
23
25   
14

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
2.16   
5

Sanderson Electronegativity
Not Available   
1.15   
19

Allred Rochow Electronegativity
1.20   
27
1.30   
24

Allen Electronegativity
Not Available   
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   
37

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   
26

5th Energy Level
Not Available   
5,257.00 kJ/mol   
32

6th Energy Level
Not Available   
6,640.80 kJ/mol   
22

7th Energy level
Not Available   
12,125.00 kJ/mol   
13

8th Energy Level
Not Available   
13,860.00 kJ/mol   
16

9th Energy Level
Not Available   
15,835.00 kJ/mol   
16

10th Energy Level
Not Available   
17,980.00 kJ/mol   
18

11th Energy Level
Not Available   
20,190.00 kJ/mol   
17

12th Energy Level
Not Available   
22,219.00 kJ/mol   
15

13th Energy Level
Not Available   
26,930.00 kJ/mol   
13

14th Energy Level
Not Available   
29,196.00 kJ/mol   
13

15th Energy Level
Not Available   
52,490.00 kJ/mol   
7

16th Energy Level
Not Available   
55,000.00 kJ/mol   
8

17th Energy Level
Not Available   
61,400.00 kJ/mol   
9

18th Energy Level
Not Available   
67,700.00 kJ/mol   
9

19th Energy Level
Not Available   
74,000.00 kJ/mol   
9

20th Energy Level
Not Available   
80,400.00 kJ/mol   
10

21st Energy Level
Not Available   
87,000.00 kJ/mol   
9

22nd Energy Level
Not Available   
93,400.00 kJ/mol   
7

23rd Energy Level
Not Available   
98,420.00 kJ/mol   
6

24th Energy Level
Not Available   
104,400.00 kJ/mol   
2

25th Energy Level
Not Available   
121,900.00 kJ/mol   
1

26th Energy Level
Not Available   
127,700.00 kJ/mol   
1

27th Energy Level
Not Available   
133,800.00 kJ/mol   
1

28th Energy Level
Not Available   
139,800.00 kJ/mol   
1

29th Energy Level
Not Available   
148,100.00 kJ/mol   
1

30th Energy Level
Not Available   
154,500.00 kJ/mol   
1

Electrochemical Equivalent
3.21 g/amp-hr   
12
0.89 g/amp-hr   
99+

Electron Work Function
Not Available   
4.60 eV   
12

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   

Atomic Properties

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   
7
54   
99+

Number of Electrons
101   
17
42   
99+

Radius of an Atom
  
  

Atomic Radius
Not Available   
139.00 pm   
39

Covalent Radius
Not Available   
154.00 pm   
32

Van der Waals Radius
246.00 pm   
8
200.00 pm   
28

Atomic Weight
258.00 amu   
14
95.95 amu   
99+

Atomic Volume
Not Available   
9.40 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Fermium
  
Niobium
  

Next Element
Nobelium
  
Technetium
  

Valence Electron Potential
Not Available   
88.60 (-eV)   
13

Lattice Constant
Not Available   
314.70 pm   
99+

Lattice Angles
NA   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
Not Available   
10.28 g/cm3   
36

Density When Liquid (at m.p.)
Not Available   
9.33 g/cm3   
20

Tensile Strength
Not Available   
324.00 MPa   
13

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
26

Elasticity properties
  
  

Shear Modulus
Not Available   
126.00 GPa   
8

Bulk Modulus
Not Available   
230.00 GPa   
6

Young's Modulus
Not Available   
329.00 GPa   
6

Poisson Ratio
Not Available   
0.31   
13

Other Mechanical Properties
Unknown   
Ductile, Weldable   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
Not Available   
10.22   
27

Magnetic Ordering
Unknown   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Unknown   
Semiconductor   

Resistivity
Not Available   
53.40 nΩ·m   
99+

Electrical Conductivity
Not Available   
0.19 106/cm Ω   
11

Electron Affinity
Not Available   
71.90 kJ/mol   
14

Thermal Properties

Specific Heat
Not Available   
0.25 J/(kg K)   
21

Molar Heat Capacity
Not Available   
24.06 J/mol·K   
99+

Thermal Conductivity
Not Available   
138.00 W/m·K   
12

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
Not Available   
4.80 µm/(m·K)   
99+

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
594.10 kJ/mol   
8

Enthalpy of Fusion
Not Available   
27.61 kJ/mol   
5

Enthalpy of Atomization
Not Available   
653.00 kJ/mol   
7

Standard Molar Entropy
Not Available   
28.70 J/mol.K   
99+

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