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Molybdenum vs Fermium

Molybdenum
Fermium
Fermium vs Molybdenum


Periodic Table
Symbol
Mo  
Fm  
Group Number
6  
12
Not Available  
Period Number
5  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7439987  
99+
7440724  
19
Space Group Name
Im_ 3m  
Not Available  
Space Group Number
229.00  
1
Not Available  
Facts
Interesting Facts
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
  • Fermium metal is highly radioactive in nature.
  • Fermium is synthetically produced metal.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Bombarding Pu-239 with Neutrons  
History
  
  
Who Discovered
Carl Wilhelm Scheele  
Lawrence Berkeley National Laboratory  
Discovery
In 1778  
In 1952  
Abundance
  
  
Abundance In Universe
5 * 10-7 %  
19
Not Available  
Abundance In Sun
~0.0000009 %  
19
~-9999 %  
Abundance In Meteorites
0.00 %  
24
Not Available  
Abundance In Earth's Crust
0.00 %  
39
Not Available  
Abundance In Oceans
0.00 %  
9
Not Available  
Abundance In Humans
0.00 %  
14
Not Available  
Uses
Uses & Benefits
  • 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.
  
  • Currently known uses of Fermium metal are limited to research purpose only.
  
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry  
NA  
Medical Uses
NA  
NA  
Other Uses
Alloys  
NA  
Biological Properties
  
  
Toxicity
Toxic  
Unknown  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
31
0.00 Blood/mg dm-3  
37
In Bone
0.70 p.p.m.  
18
0.00 p.p.m.  
36
Physical Properties
Melting Point
2,617.00 °C  
5
1,527.00 °C  
26
Boiling Point
4,612.00 °C  
9
Not Available  
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
Unknown  
Luster
Metallic  
Not Defined  
Hardness
  
  
Mohs Hardness
5.50  
7
Not Available  
Brinell Hardness
1,370.00 MPa  
7
Not Available  
Vickers Hardness
1,400.00 MPa  
6
Not Available  
Speed of Sound
5,400.00 m/s  
6
Not Available  
Optical Properties
  
  
Reflectivity
58.00 %  
15
Not Available  
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
Mo  
Fm  
Isotopes
  
  
Known Isotopes
25  
14
18  
21
Electronegativity
  
  
Pauling Electronegativity
2.16  
5
1.30  
32
Sanderson Electronegativity
1.15  
19
Not Available  
Allred Rochow Electronegativity
1.30  
24
1.20  
27
Allen Electronegativity
2.16  
3
Not Available  
Electropositivity
  
  
Pauling Electropositivity
1.84  
99+
2.70  
22
Ionization Energies
  
  
1st Energy Level
684.30 kJ/mol  
37
627.00 kJ/mol  
99+
2nd Energy Level
1,560.00 kJ/mol  
37
1,225.00 kJ/mol  
99+
3rd Energy Level
2,618.00 kJ/mol  
99+
2,363.00 kJ/mol  
99+
4th Energy Level
4,480.00 kJ/mol  
26
3,792.00 kJ/mol  
99+
5th Energy Level
5,257.00 kJ/mol  
32
Not Available  
6th Energy Level
6,640.80 kJ/mol  
22
Not Available  
7th Energy level
12,125.00 kJ/mol  
13
Not Available  
8th Energy Level
13,860.00 kJ/mol  
16
Not Available  
9th Energy Level
15,835.00 kJ/mol  
16
Not Available  
10th Energy Level
17,980.00 kJ/mol  
18
Not Available  
11th Energy Level
20,190.00 kJ/mol  
17
Not Available  
12th Energy Level
22,219.00 kJ/mol  
15
Not Available  
13th Energy Level
26,930.00 kJ/mol  
13
Not Available  
14th Energy Level
29,196.00 kJ/mol  
13
Not Available  
15th Energy Level
52,490.00 kJ/mol  
7
Not Available  
16th Energy Level
55,000.00 kJ/mol  
8
Not Available  
17th Energy Level
61,400.00 kJ/mol  
9
Not Available  
18th Energy Level
67,700.00 kJ/mol  
9
Not Available  
19th Energy Level
74,000.00 kJ/mol  
9
Not Available  
20th Energy Level
80,400.00 kJ/mol  
10
Not Available  
21st Energy Level
87,000.00 kJ/mol  
9
Not Available  
22nd Energy Level
93,400.00 kJ/mol  
7
Not Available  
23rd Energy Level
98,420.00 kJ/mol  
6
Not Available  
24th Energy Level
104,400.00 kJ/mol  
2
Not Available  
25th Energy Level
121,900.00 kJ/mol  
1
Not Available  
26th Energy Level
127,700.00 kJ/mol  
1
Not Available  
27th Energy Level
133,800.00 kJ/mol  
1
Not Available  
28th Energy Level
139,800.00 kJ/mol  
1
Not Available  
29th Energy Level
148,100.00 kJ/mol  
1
Not Available  
30th Energy Level
154,500.00 kJ/mol  
1
Not Available  
Electrochemical Equivalent
0.89 g/amp-hr  
99+
3.20 g/amp-hr  
13
Electron Work Function
4.60 eV  
12
Not Available  
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
42  
99+
100  
18
Electron Configuration
[Kr] 4d5 5s1  
[Rn] 5f12 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Not Known  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
Unknown-Crystal-Structure-of-Fermium.jpg#100  
Atom
  
  
Number of Protons
42  
99+
100  
18
Number of Neutrons
54  
99+
157  
7
Number of Electrons
42  
99+
100  
18
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
39
Not Available  
Covalent Radius
154.00 pm  
32
Not Available  
Van der Waals Radius
200.00 pm  
28
245.00 pm  
9
Atomic Weight
95.95 amu  
99+
257.00 amu  
15
Atomic Volume
9.40 cm3/mol  
99+
Not Available  
Adjacent Atomic Numbers
  
  
Previous Element
Niobium
  
Einsteinium
  
Next Element
Technetium
  
Mendelevium
  
Valence Electron Potential
88.60 (-eV)  
13
Not Available  
Lattice Constant
314.70 pm  
99+
Not Available  
Lattice Angles
π/2, π/2, π/2  
NA  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
10.28 g/cm3  
36
Not Available  
Density When Liquid (at m.p.)
9.33 g/cm3  
20
Not Available  
Tensile Strength
324.00 MPa  
13
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
0.00 (Pa)  
26
Not Available  
Elasticity properties
  
  
Shear Modulus
126.00 GPa  
8
Not Available  
Bulk Modulus
230.00 GPa  
6
Not Available  
Young's Modulus
329.00 GPa  
6
Not Available  
Poisson Ratio
0.31  
13
Not Available  
Other Mechanical Properties
Ductile, Weldable  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
10.22  
27
Not Available  
Magnetic Ordering
Paramagnetic  
Unknown  
Electrical Properties
  
  
Electrical Property
Semiconductor  
Unknown  
Resistivity
53.40 nΩ·m  
99+
Not Available  
Electrical Conductivity
0.19 106/cm Ω  
11
Not Available  
Electron Affinity
71.90 kJ/mol  
14
Not Available  
Thermal Properties
Specific Heat
0.25 J/(kg K)  
21
Not Available  
Molar Heat Capacity
24.06 J/mol·K  
99+
Not Available  
Thermal Conductivity
138.00 W/m·K  
12
Not Available  
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
4.80 µm/(m·K)  
99+
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
594.10 kJ/mol  
8
Not Available  
Enthalpy of Fusion
27.61 kJ/mol  
5
Not Available  
Enthalpy of Atomization
653.00 kJ/mol  
7
Not Available  
Standard Molar Entropy
28.70 J/mol.K  
99+
Not Available  
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