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Berkelium vs Tungsten


Tungsten vs Berkelium


Periodic Table

Symbol
Bk   
W   

Group Number
Not Available   
6   
12

Period Number
7   
6   

Block
f block   
d block   

Element Family
Actinide   
Transition Metal   

CAS Number
7440406   
99+
7440337   
99+

Space Group Name
P63/mmc   
Im_ 3m   

Space Group Number
194.00   
5
229.00   
1

Facts

Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  

Sources
Bombarding Americium with Alpha Particles.   
Earth's crust, Found in Minerals, Mining, Ores of Minerals   

History
  
  

Who Discovered
Lawrence Berkeley National Laboratory   
Not Available   

Discovery
In 1949   
In 1781   

Abundance
  
  

Abundance In Universe
Not Available   
5 * 10-8 %   
27

Abundance In Sun
~-9999 %   
~0.0000004 %   
23

Abundance In Meteorites
Not Available   
0.00 %   
39

Abundance In Earth's Crust
Not Available   
0.00 %   
39

Abundance In Oceans
Not Available   
0.00 %   
18

Uses

Uses & Benefits
  • This metal is very rare and has no commercial uses.
  
  • 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.
  

Industrial Uses
NA   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   

Medical Uses
NA   
NA   

Other Uses
NA   
Alloys   

Biological Properties
  
  

Toxicity
Unknown   
Non 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
0.00 p.p.m.   
35

Physical Properties

Melting Point
986.00 °C   
99+
3,410.00 °C   
1

Boiling Point
2,627.00 °C   
40
5,660.00 °C   
1

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silver   
Grayish White   

Luster
Metallic   
Lustrous   

Hardness
  
  

Mohs Hardness
Not Available   
7.50   
2

Brinell Hardness
Not Available   
2,000.00 MPa   
4

Vickers Hardness
Not Available   
3,430.00 MPa   
1

Speed of Sound
Not Available   
4,620.00 m/s   
16

Optical Properties
  
  

Reflectivity
Not Available   
62.00 %   
13

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
Bk   
W   

Isotopes
  
  

Known Isotopes
14   
25
33   
6

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
2.36   
2

Sanderson Electronegativity
Not Available   
0.98   
23

Allred Rochow Electronegativity
1.20   
27
1.40   
19

Allen Electronegativity
2.70   
1
1.47   
29

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
1.64   
99+

Ionization Energies
  
  

1st Energy Level
601.00 kJ/mol   
99+
770.00 kJ/mol   
16

2nd Energy Level
1,186.00 kJ/mol   
99+
1,700.00 kJ/mol   
29

3rd Energy Level
2,152.00 kJ/mol   
99+
Not Available   

4th Energy Level
3,434.00 kJ/mol   
99+
Not Available   

Electrochemical Equivalent
3.07 g/amp-hr   
16
1.14 g/amp-hr   
99+

Electron Work Function
Not Available   
4.55 eV   
13

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

Atomic Properties

Atomic Number
97   
21
74   
99+

Electron Configuration
[Rn] 5f9 7s2   
[Xe] 4f14 5d4 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Body Centered Cubic (BCC)   

Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
97   
21
74   
99+

Number of Neutrons
150   
11
110   
27

Number of Electrons
97   
21
74   
99+

Radius of an Atom
  
  

Atomic Radius
170.00 pm   
22
139.00 pm   
39

Covalent Radius
Not Available   
162.00 pm   
29

Van der Waals Radius
Not Available   
200.00 pm   
28

Atomic Weight
247.00 amu   
18
183.84 amu   
37

Atomic Volume
Not Available   
9.53 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Curium
  
Tantalum
  

Next Element
Rhenium
  

Valence Electron Potential
45.50 (-eV)   
36
140.00 (-eV)   
5

Lattice Constant
341.60 pm   
99+
316.52 pm   
99+

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

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
14.78 g/cm3   
22
19.25 g/cm3   
16

Density When Liquid (at m.p.)
13.25 g/cm3   
11
17.60 g/cm3   
5

Tensile Strength
Not Available   
370.00 MPa   
10

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
32

Elasticity properties
  
  

Shear Modulus
Not Available   
161.00 GPa   
5

Bulk Modulus
Not Available   
310.00 GPa   
4

Young's Modulus
Not Available   
411.00 GPa   
4

Poisson Ratio
Not Available   
0.28   
17

Other Mechanical Properties
NA   
Ductile, Malleable   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
14.00   
14
19.22   
9

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
Superconductor   

Resistivity
Not Available   
52.80 nΩ·m   
99+

Electrical Conductivity
Not Available   
0.19 106/cm Ω   
10

Electron Affinity
Not Available   
78.60 kJ/mol   
13

Thermal Properties

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

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

Thermal Conductivity
10.00 W/m·K   
99+
173.00 W/m·K   
7

Critical Temperature
Not Available   
Not Available   

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

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
799.10 kJ/mol   
1

Enthalpy of Fusion
Not Available   
35.23 kJ/mol   
1

Enthalpy of Atomization
Not Available   
837.00 kJ/mol   
1

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

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