Home
Compare Metals


Fermium Rhenium Comparison


Rhenium Fermium comparison


Periodic Table

Symbol
Fm   
Re   

Group Number
Not Available   
7   
11

Period Number
7   
6   

Block
f block   
d block   

Element Family
Actinide   
Transition Metal   

CAS Number
7440724   
19
7440155   
99+

Space Group Name
Not Available   
P63/mmc   

Space Group Number
Not Available   
194.00   
5

Facts

Interesting Facts
  • Fermium metal is highly radioactive in nature.
  • Fermium is synthetically produced metal.
  
  • Chemical properties of Rhenium are similar to Manganese.
  • Rhenium metal is created while refining Molybdenum.
  

Sources
Bombarding Pu-239 with Neutrons   
Found in Minerals, Mining, Ores of Minerals   

History
  
  

Who Discovered
Lawrence Berkeley National Laboratory   
Masataka Ogawa   

Discovery
In 1952   
In 1908   

Abundance
  
  

Abundance In Universe
Not Available   
2 * 10-8 %   
29

Abundance In Sun
~-9999 %   
~0.00000001 %   
29

Abundance In Meteorites
Not Available   
0.00 %   
99+

Abundance In Earth's Crust
Not Available   
0.00 %   
99+

Abundance In Oceans
Not Available   
0.00 %   
34

Uses

Uses & Benefits
  • Currently known uses of Fermium 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
NA   
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   

Medical Uses
NA   
NA   

Other Uses
NA   
Alloys   

Biological Properties
  
  

Toxicity
Unknown   
Low Toxic   

Present in Human Body
No   
No   

In Blood
0.00 Blood/mg dm-3   
37
Not Available   

In Bone
0.00 p.p.m.   
36
Not Available   

Physical Properties

Melting Point
1,527.00 °C   
26
3,180.00 °C   
2

Boiling Point
Not Available   
5,627.00 °C   
2

Appearance
  
  

Physical State
Solid   
Solid   

Color
Unknown   
Silvery Gray   

Luster
Not Defined   
Metallic   

Hardness
  
  

Mohs Hardness
Not Available   
7.00   
3

Brinell Hardness
Not Available   
1,320.00 MPa   
8

Vickers Hardness
Not Available   
1,350.00 MPa   
7

Speed of Sound
Not Available   
4,700.00 m/s   
15

Optical Properties
  
  

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
Fm   
Re   

Isotopes
  
  

Known Isotopes
18   
21
33   
6

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
1.90   
11

Allred Rochow Electronegativity
1.20   
27
1.46   
15

Allen Electronegativity
Not Available   
1.60   
21

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
2.10   
99+

Ionization Energies
  
  

1st Energy Level
627.00 kJ/mol   
99+
760.00 kJ/mol   
20

2nd Energy Level
1,225.00 kJ/mol   
99+
1,260.00 kJ/mol   
99+

3rd Energy Level
2,363.00 kJ/mol   
99+
2,510.00 kJ/mol   
99+

4th Energy Level
3,792.00 kJ/mol   
99+
3,640.00 kJ/mol   
99+

Electrochemical Equivalent
3.20 g/amp-hr   
13
0.99 g/amp-hr   
99+

Electron Work Function
Not Available   
4.96 eV   
7

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

Atomic Properties

Atomic Number
100   
18
75   
99+

Electron Configuration
[Rn] 5f12 7s2   
[Xe] 4f14 5d5 6s2   

Crystal Structure
Not Known   
Hexagonal Close Packed (HCP)   

Crystal Lattice
Unknown-Crystal-Structure-of-Fermium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
100   
18
75   
40

Number of Neutrons
157   
7
111   
26

Number of Electrons
100   
18
75   
40

Radius of an Atom
  
  

Atomic Radius
Not Available   
137.00 pm   
40

Covalent Radius
Not Available   
151.00 pm   
34

Van der Waals Radius
245.00 pm   
9
200.00 pm   
28

Atomic Weight
257.00 amu   
15
186.21 amu   
36

Atomic Volume
Not Available   
8.85 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Tungsten
  

Next Element
Osmium
  

Valence Electron Potential
Not Available   
180.00 (-eV)   
3

Lattice Constant
Not Available   
276.10 pm   
99+

Lattice Angles
NA   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
1.62   
3

Mechanical Properties

Density
  
  

Density At Room Temperature
Not Available   
21.02 g/cm3   
12

Density When Liquid (at m.p.)
Not Available   
18.90 g/cm3   
4

Tensile Strength
Not Available   
1,070.00 MPa   
3

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
29

Elasticity properties
  
  

Shear Modulus
Not Available   
178.00 GPa   
3

Bulk Modulus
Not Available   
370.00 GPa   
2

Young's Modulus
Not Available   
463.00 GPa   
2

Poisson Ratio
Not Available   
0.30   
14

Other Mechanical Properties
NA   
Ductile, Malleable   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
Not Available   
21.02   
5

Magnetic Ordering
Unknown   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Unknown   
Conductor   

Resistivity
Not Available   
193.00 nΩ·m   
20

Electrical Conductivity
Not Available   
0.05 106/cm Ω   
33

Electron Affinity
Not Available   
14.50 kJ/mol   
35

Thermal Properties

Specific Heat
Not Available   
0.13 J/(kg K)   
39

Molar Heat Capacity
Not Available   
25.48 J/mol·K   
38

Thermal Conductivity
Not Available   
48.00 W/m·K   
31

Critical Temperature
Not Available   
Not Available   

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

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
707.10 kJ/mol   
3

Enthalpy of Fusion
Not Available   
33.05 kJ/mol   
2

Enthalpy of Atomization
Not Available   
791.00 kJ/mol   
2

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

Summary >>
<< Thermal

Compare Actinide Series

Actinide Metals

Actinide Metals

» More Actinide Metals

Compare Actinide Series

» More Compare Actinide Series