Symbol
W
  
Fm
  
Group Number
Not Available
  
Period Number
6
  
7
  
Block
d block
  
f block
  
Element Family
Transition Metal
  
Actinide
  
Space Group Name
Im_ 3m
  
Not Available
  
Space Group Number
Not Available
  
Interesting Facts
- Tungsten element has the second highest melting point.
- Pure tungsten can easily cut down with the help of hacksaw.
  
- Fermium metal is highly radioactive in nature.
- Fermium is synthetically produced metal.
  
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals
  
Bombarding Pu-239 with Neutrons
  
History
  
  
Who Discovered
Not Available
  
Lawrence Berkeley National Laboratory
  
Discovery
In 1781
  
In 1952
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~0.0000004 %
  
23
~-9999 %
  
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available
  
Uses & Benefits
- 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.
  
- Currently known uses of Fermium metal are limited to research purpose only.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
  
NA
  
Medical Uses
NA
  
NA
  
Other Uses
Alloys
  
NA
  
Biological Properties
  
  
Toxicity
Non 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
0.00 p.p.m.
  
35
0.00 p.p.m.
  
36
Melting Point
1,527.00 °C
  
26
Boiling Point
Not Available
  
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Grayish White
  
Unknown
  
Luster
Lustrous
  
Not Defined
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
2,000.00 MPa
  
4
Not Available
  
Vickers Hardness
3,430.00 MPa
  
1
Not Available
  
Speed of Sound
4,620.00 m/s
  
16
Not Available
  
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
W
  
Fm
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
770.00 kJ/mol
  
16
627.00 kJ/mol
  
99+
2nd Energy Level
1,700.00 kJ/mol
  
29
1,225.00 kJ/mol
  
99+
3rd Energy Level
Not Available
  
2,363.00 kJ/mol
  
99+
4th Energy Level
Not Available
  
3,792.00 kJ/mol
  
99+
Electrochemical Equivalent
1.14 g/amp-hr
  
99+
3.20 g/amp-hr
  
13
Electron Work Function
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
  
Ionization, Radioactive Isotopes, Radioactivity
  
Electron Configuration
[Xe] 4f14 5d4 6s2
  
[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
  
  
Radius of an Atom
  
  
Atomic Radius
Not Available
  
Covalent Radius
Not Available
  
Atomic Volume
9.53 cm3/mol
  
99+
Not Available
  
Adjacent Atomic Numbers
  
  
Valence Electron Potential
140.00 (-eV)
  
5
Not Available
  
Lattice Constant
Not Available
  
Lattice Angles
π/2, π/2, π/2
  
NA
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
19.25 g/cm
3
  
16
Not Available
  
Density When Liquid (at m.p.)
Not Available
  
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
Ductile, Malleable
  
NA
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Paramagnetic
  
Unknown
  
Electrical Properties
  
  
Electrical Property
Superconductor
  
Unknown
  
Resistivity
52.80 nΩ·m
  
99+
Not Available
  
Electrical Conductivity
0.19 10
6/cm Ω
  
10
Not Available
  
Electron Affinity
78.60 kJ/mol
  
13
Not Available
  
Specific Heat
0.13 J/(kg K)
  
39
Not Available
  
Molar Heat Capacity
24.27 J/mol·K
  
99+
Not Available
  
Thermal Conductivity
173.00 W/m·K
  
7
Not Available
  
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
4.50 µm/(m·K)
  
99+
Not Available
  
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol
  
1
Not Available
  
Enthalpy of Fusion
35.23 kJ/mol
  
1
Not Available
  
Enthalpy of Atomization
837.00 kJ/mol
  
1
Not Available
  
Standard Molar Entropy
32.60 J/mol.K
  
99+
Not Available