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Dubnium vs Molybdenum

Dubnium
Molybdenum
Molybdenum vs Dubnium


Periodic Table
Symbol
Db  
Mo  
Group Number
5  
13
6  
12
Period Number
7  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
53850354  
14
7439987  
99+
Space Group Name
-  
Im_ 3m  
Space Group Number
166.00  
9
229.00  
2
Facts
Interesting Facts
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
  • 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
Produced by Bombarding Am243 with Ne22, Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Joint Institute for Nuclear Research  
Carl Wilhelm Scheele  
Discovery
In 1968  
In 1778  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
20
Abundance In Sun
-  
0.00 %  
19
Abundance In Meteorites
0.00 %  
99+
0.00 %  
24
Abundance In Earth's Crust
-  
0.00 %  
39
Abundance In Oceans
-  
0.00 %  
9
Abundance In Humans
-  
0.00 %  
17
Uses
Uses & Benefits
  • Currently known uses of Dubnium metal are limited to research purpose only.
  
  • 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
Research Purposes  
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
-  
2,617.00 °C  
5
Boiling Point
0.00 °C  
99+
4,612.00 °C  
9
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Gray  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
5.50  
7
Brinell Hardness
330.00 MPa  
38
1,370.00 MPa  
7
Vickers Hardness
400.00 MPa  
99+
1,400.00 MPa  
11
Speed of Sound
2,680.00 m/s  
99+
5,400.00 m/s  
9
Optical Properties
  
  
Refractive Index
1.20  
99+
2.00  
15
Reflectivity
55.00 %  
27
58.00 %  
25
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Db  
Mo  
Isotopes
  
  
Known Isotopes
10  
28
25  
14
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
2.16  
6
Sanderson Electronegativity
1.30  
25
1.15  
34
Allred Rochow Electronegativity
1.30  
25
1.30  
25
Mulliken-Jaffe Electronegativity
1.10  
99+
2.16  
7
Allen Electronegativity
1.30  
40
2.16  
3
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
1.84  
99+
Ionization Energies
  
  
1st Energy Level
664.80 kJ/mol  
38
684.30 kJ/mol  
37
2nd Energy Level
1,546.70 kJ/mol  
39
1,560.00 kJ/mol  
38
3rd Energy Level
2,378.40 kJ/mol  
99+
2,618.00 kJ/mol  
99+
4th Energy Level
3,298.80 kJ/mol  
99+
4,480.00 kJ/mol  
36
5th Energy Level
4,305.20 kJ/mol  
99+
5,257.00 kJ/mol  
99+
6th Energy Level
12,900.00 kJ/mol  
5
6,640.80 kJ/mol  
99+
7th Energy level
3,300.00 kJ/mol  
99+
12,125.00 kJ/mol  
13
8th Energy Level
5,280.00 kJ/mol  
99+
13,860.00 kJ/mol  
16
9th Energy Level
5,780.00 kJ/mol  
99+
15,835.00 kJ/mol  
16
10th Energy Level
8,830.00 kJ/mol  
22
17,980.00 kJ/mol  
18
11th Energy Level
3,300.00 kJ/mol  
99+
20,190.00 kJ/mol  
17
12th Energy Level
88,300.00 kJ/mol  
2
22,219.00 kJ/mol  
38
13th Energy Level
4,760.00 kJ/mol  
99+
26,930.00 kJ/mol  
13
14th Energy Level
1,120.00 kJ/mol  
99+
29,196.00 kJ/mol  
13
15th Energy Level
33,000.00 kJ/mol  
99+
52,490.00 kJ/mol  
99+
16th Energy Level
33,000.00 kJ/mol  
99+
55,000.00 kJ/mol  
99+
17th Energy Level
1,129.00 kJ/mol  
19
61,400.00 kJ/mol  
9
18th Energy Level
0.00 kJ/mol  
99+
67,700.00 kJ/mol  
9
19th Energy Level
1,094.90 kJ/mol  
18
74,000.00 kJ/mol  
9
20th Energy Level
0.00 kJ/mol  
99+
80,400.00 kJ/mol  
10
21st Energy Level
883.00 kJ/mol  
36
87,000.00 kJ/mol  
9
22nd Energy Level
330.00 kJ/mol  
99+
93,400.00 kJ/mol  
7
23rd Energy Level
1,150.00 kJ/mol  
33
98,420.00 kJ/mol  
6
24th Energy Level
528.30 kJ/mol  
99+
104,400.00 kJ/mol  
2
25th Energy Level
0.00 kJ/mol  
99+
121,900.00 kJ/mol  
1
26th Energy Level
579.80 kJ/mol  
99+
127,700.00 kJ/mol  
1
27th Energy Level
0.00 kJ/mol  
99+
133,800.00 kJ/mol  
1
28th Energy Level
1,150.00 kJ/mol  
3
139,800.00 kJ/mol  
1
29th Energy Level
1,094.00 kJ/mol  
5
148,100.00 kJ/mol  
1
30th Energy Level
0.00 kJ/mol  
99+
154,500.00 kJ/mol  
1
Electrochemical Equivalent
3.00 g/amp-hr  
21
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
105  
13
42  
99+
Electron Configuration
[Rn] 5f14 6d3 7s2  
[Kr] 4d5 5s1  
Crystal Structure
Body Centered Cubic (BCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
105  
13
42  
99+
Number of Neutrons
157  
8
54  
99+
Number of Electrons
105  
13
42  
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
139.00 pm  
99+
Covalent Radius
149.00 pm  
37
154.00 pm  
34
Van der Waals Radius
0.00 pm  
99+
200.00 pm  
35
Atomic Weight
268.00 amu  
10
95.95 amu  
99+
Atomic Volume
22.80 cm3/mol  
17
9.40 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rutherfordium
  
Niobium
  
Next Element
Seaborgium
  
Technetium
  
Valence Electron Potential
0.00 (-eV)  
99+
88.60 (-eV)  
13
Lattice Constant
-  
314.70 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.63  
14
1.03  
99+
Mechanical
Density
  
  
Density At Room Temperature
29.30 g/cm3  
5
10.28 g/cm3  
39
Density When Liquid (at m.p.)
29.30 g/cm3  
6
9.33 g/cm3  
99+
Tensile Strength
0.10 MPa  
99+
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
34.00 GPa  
22
126.00 GPa  
8
Bulk Modulus
39.00 GPa  
39
230.00 GPa  
6
Young's Modulus
0.00 GPa  
99+
329.00 GPa  
6
Poisson Ratio
0.39  
5
0.31  
13
Other Mechanical Properties
-  
Ductile, Weldable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
39.00  
3
10.22  
40
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
29
Electrical Properties
  
  
Electrical Property
-  
Semiconductor  
Resistivity
6.80 nΩ·m  
99+
53.40 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.19 106/cm Ω  
11
Electron Affinity
-  
71.90 kJ/mol  
16
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.25 J/(kg K)  
21
Molar Heat Capacity
29.30 J/mol·K  
11
24.06 J/mol·K  
99+
Thermal Conductivity
0.00 W/m·K  
99+
138.00 W/m·K  
12
Critical Temperature
1,323.00 K  
99+
2,896.00 K  
6
Thermal Expansion
13.20 µm/(m·K)  
37
4.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
289.70 kJ/mol  
99+
594.10 kJ/mol  
9
Enthalpy of Fusion
-  
27.61 kJ/mol  
5
Enthalpy of Atomization
-  
653.00 kJ/mol  
7
Standard Molar Entropy
55.00 J/mol.K  
34
28.70 J/mol.K  
99+
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