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Berkelium vs Molybdenum

Berkelium
Molybdenum
Molybdenum vs Berkelium


Periodic Table
Symbol
Bk  
Mo  
Group Number
14  
4
6  
12
Period Number
7  
5  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440406  
99+
7439987  
99+
Space Group Name
P63/mmc  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
  • 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 Americium with Alpha Particles.  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Carl Wilhelm Scheele  
Discovery
In 1949  
In 1778  
Abundance
  
  
Abundance In Universe
0.00 %  
36
0.00 %  
20
Abundance In Sun
0.00 %  
30
0.00 %  
19
Abundance In Meteorites
0.00 %  
99+
0.00 %  
24
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
39
Abundance In Oceans
-  
0.00 %  
9
Abundance In Humans
0.00 %  
24
0.00 %  
17
Uses
Uses & Benefits
  • This metal is very rare and has no commercial uses.
  
  • 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
-  
Aerospace Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
-  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
31
In Bone
0.00 p.p.m.  
99+
0.70 p.p.m.  
20
Physical
Melting Point
986.00 °C  
99+
2,617.00 °C  
5
Boiling Point
2,627.00 °C  
99+
4,612.00 °C  
9
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
5.50  
7
Brinell Hardness
260.00 MPa  
99+
1,370.00 MPa  
7
Vickers Hardness
1,070.00 MPa  
16
1,400.00 MPa  
11
Speed of Sound
2,560.00 m/s  
99+
5,400.00 m/s  
9
Optical Properties
  
  
Refractive Index
1.30  
99+
2.00  
15
Reflectivity
61.00 %  
22
58.00 %  
25
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Bk  
Mo  
Isotopes
  
  
Known Isotopes
14  
25
25  
14
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.16  
6
Sanderson Electronegativity
1.30  
25
1.15  
34
Allred Rochow Electronegativity
1.20  
28
1.30  
25
Mulliken-Jaffe Electronegativity
1.30  
33
2.16  
7
Allen Electronegativity
2.70  
1
2.16  
3
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.84  
99+
Ionization Energies
  
  
1st Energy Level
601.00 kJ/mol  
99+
684.30 kJ/mol  
37
2nd Energy Level
1,186.00 kJ/mol  
99+
1,560.00 kJ/mol  
38
3rd Energy Level
2,152.00 kJ/mol  
99+
2,618.00 kJ/mol  
99+
4th Energy Level
3,434.00 kJ/mol  
99+
4,480.00 kJ/mol  
36
5th Energy Level
6,010.00 kJ/mol  
99+
5,257.00 kJ/mol  
99+
6th Energy Level
6,010.00 kJ/mol  
99+
6,640.80 kJ/mol  
99+
7th Energy level
6,010.00 kJ/mol  
99+
12,125.00 kJ/mol  
13
8th Energy Level
6,010.00 kJ/mol  
99+
13,860.00 kJ/mol  
16
9th Energy Level
6,010.00 kJ/mol  
99+
15,835.00 kJ/mol  
16
10th Energy Level
6,010.00 kJ/mol  
99+
17,980.00 kJ/mol  
18
11th Energy Level
6,010.00 kJ/mol  
99+
20,190.00 kJ/mol  
17
12th Energy Level
60,100.00 kJ/mol  
16
22,219.00 kJ/mol  
38
13th Energy Level
6,010.00 kJ/mol  
99+
26,930.00 kJ/mol  
13
14th Energy Level
6,010.00 kJ/mol  
32
29,196.00 kJ/mol  
13
15th Energy Level
60,100.00 kJ/mol  
99+
52,490.00 kJ/mol  
99+
16th Energy Level
60,100.00 kJ/mol  
33
55,000.00 kJ/mol  
99+
17th Energy Level
601.00 kJ/mol  
99+
61,400.00 kJ/mol  
9
18th Energy Level
6,010.00 kJ/mol  
99+
67,700.00 kJ/mol  
9
19th Energy Level
601.00 kJ/mol  
99+
74,000.00 kJ/mol  
9
20th Energy Level
601.00 kJ/mol  
99+
80,400.00 kJ/mol  
10
21st Energy Level
6,010.00 kJ/mol  
18
87,000.00 kJ/mol  
9
22nd Energy Level
601.00 kJ/mol  
99+
93,400.00 kJ/mol  
7
23rd Energy Level
6,010.00 kJ/mol  
19
98,420.00 kJ/mol  
6
24th Energy Level
601.00 kJ/mol  
99+
104,400.00 kJ/mol  
2
25th Energy Level
601.00 kJ/mol  
99+
121,900.00 kJ/mol  
1
26th Energy Level
601.00 kJ/mol  
99+
127,700.00 kJ/mol  
1
27th Energy Level
601.00 kJ/mol  
99+
133,800.00 kJ/mol  
1
28th Energy Level
601.00 kJ/mol  
99+
139,800.00 kJ/mol  
1
29th Energy Level
601.00 kJ/mol  
99+
148,100.00 kJ/mol  
1
30th Energy Level
601.00 kJ/mol  
99+
154,500.00 kJ/mol  
1
Electrochemical Equivalent
3.07 g/amp-hr  
19
0.89 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.60 eV  
17
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
97  
21
42  
99+
Electron Configuration
[Rn] 5f9 7s2  
[Kr] 4d5 5s1  
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
42  
99+
Number of Neutrons
150  
12
54  
99+
Number of Electrons
97  
21
42  
99+
Radius of an Atom
  
  
Atomic Radius
170.00 pm  
24
139.00 pm  
99+
Covalent Radius
170.00 pm  
27
154.00 pm  
34
Van der Waals Radius
244.00 pm  
14
200.00 pm  
35
Atomic Weight
247.00 amu  
18
95.95 amu  
99+
Atomic Volume
13.39 cm3/mol  
99+
9.40 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Curium
  
Niobium
  
Next Element
Californium
  
Technetium
  
Valence Electron Potential
45.50 (-eV)  
37
88.60 (-eV)  
13
Lattice Constant
341.60 pm  
99+
314.70 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
38
1.03  
99+
Mechanical
Density
  
  
Density At Room Temperature
14.78 g/cm3  
23
10.28 g/cm3  
39
Density When Liquid (at m.p.)
13.25 g/cm3  
29
9.33 g/cm3  
99+
Tensile Strength
70.00 MPa  
31
324.00 MPa  
15
Viscosity
0.00  
25
0.00  
5
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
27
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
126.00 GPa  
8
Bulk Modulus
13.00 GPa  
99+
230.00 GPa  
6
Young's Modulus
13.00 GPa  
99+
329.00 GPa  
6
Poisson Ratio
0.35  
9
0.31  
13
Other Mechanical Properties
-  
Ductile, Weldable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
14.00  
25
10.22  
40
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
13
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
29
Electrical Properties
  
  
Electrical Property
Conductor  
Semiconductor  
Resistivity
7.60 nΩ·m  
99+
53.40 nΩ·m  
99+
Electrical Conductivity
0.10 106/cm Ω  
25
0.19 106/cm Ω  
11
Electron Affinity
0.00 kJ/mol  
99+
71.90 kJ/mol  
16
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.25 J/(kg K)  
21
Molar Heat Capacity
27.00 J/mol·K  
29
24.06 J/mol·K  
99+
Thermal Conductivity
10.00 W/m·K  
99+
138.00 W/m·K  
12
Critical Temperature
1,323.00 K  
99+
2,896.00 K  
6
Thermal Expansion
13.25 µm/(m·K)  
36
4.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
380.00 kJ/mol  
27
594.10 kJ/mol  
9
Enthalpy of Fusion
13.25 kJ/mol  
31
27.61 kJ/mol  
5
Enthalpy of Atomization
601.00 kJ/mol  
11
653.00 kJ/mol  
7
Standard Molar Entropy
52.00 J/mol.K  
37
28.70 J/mol.K  
99+
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