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Dubnium vs Manganese

Dubnium
Manganese
Manganese vs Dubnium


Periodic Table
Symbol
Db  
Mn  
Group Number
5  
13
7  
11
Period Number
7  
4  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
53850354  
14
7439965  
99+
Space Group Name
-  
I_ 43m  
Space Group Number
166.00  
9
217.00  
5
Facts
Interesting Facts
  • IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
  • In the production of Dubnium, thermal gradient chromatography is used.
  
  • Manganese is an essential trace element in all forms of life.
  • Manganese metal oxidizes very easily, but it does not fuse that easily.
  
Sources
Produced by Bombarding Am243 with Ne22, Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Joint Institute for Nuclear Research  
Johann Gottlieb Gahn  
Discovery
In 1968  
In 1774  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
9
Abundance In Sun
-  
0.00 %  
8
Abundance In Meteorites
0.00 %  
99+
0.27 %  
8
Abundance In Earth's Crust
-  
0.11 %  
8
Abundance In Oceans
-  
0.00 %  
13
Abundance In Humans
-  
0.00 %  
15
Uses
Uses & Benefits
  • Currently known uses of Dubnium metal are limited to research purpose only.
  
  • This metal is very brittle hence it mostly not used as a pure metal, but its alloys are very useful
  • Its alloy Manganese steel is extremely strong and used in railway tracks, safes, prison bars and riffle barrels.
  
Industrial Uses
-  
Automobile 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
0.08 Blood/mg dm-3  
14
In Bone
0.00 p.p.m.  
99+
100.00 p.p.m.  
8
Physical
Melting Point
-  
1,245.00 °C  
37
Boiling Point
0.00 °C  
99+
1,962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silver  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
6.00  
6
Brinell Hardness
330.00 MPa  
38
196.00 MPa  
99+
Vickers Hardness
400.00 MPa  
99+
196.00 MPa  
99+
Speed of Sound
2,680.00 m/s  
99+
5,150.00 m/s  
11
Optical Properties
  
  
Refractive Index
1.20  
99+
2.00  
15
Reflectivity
55.00 %  
27
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Db  
Mn  
Isotopes
  
  
Known Isotopes
10  
28
21  
18
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
1.55  
26
Sanderson Electronegativity
1.30  
25
2.20  
8
Allred Rochow Electronegativity
1.30  
25
1.60  
10
Mulliken-Jaffe Electronegativity
1.10  
99+
1.55  
23
Allen Electronegativity
1.30  
40
1.75  
18
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
2.45  
29
Ionization Energies
  
  
1st Energy Level
664.80 kJ/mol  
38
717.30 kJ/mol  
30
2nd Energy Level
1,546.70 kJ/mol  
39
1,509.00 kJ/mol  
40
3rd Energy Level
2,378.40 kJ/mol  
99+
3,248.00 kJ/mol  
21
4th Energy Level
3,298.80 kJ/mol  
99+
4,940.00 kJ/mol  
30
5th Energy Level
4,305.20 kJ/mol  
99+
6,990.00 kJ/mol  
29
6th Energy Level
12,900.00 kJ/mol  
5
9,220.00 kJ/mol  
22
7th Energy level
3,300.00 kJ/mol  
99+
11,500.00 kJ/mol  
16
8th Energy Level
5,280.00 kJ/mol  
99+
18,770.00 kJ/mol  
5
9th Energy Level
5,780.00 kJ/mol  
99+
21,400.00 kJ/mol  
6
10th Energy Level
8,830.00 kJ/mol  
22
23,960.00 kJ/mol  
9
11th Energy Level
3,300.00 kJ/mol  
99+
27,590.00 kJ/mol  
10
12th Energy Level
88,300.00 kJ/mol  
2
30,330.00 kJ/mol  
32
13th Energy Level
4,760.00 kJ/mol  
99+
33,150.00 kJ/mol  
11
14th Energy Level
1,120.00 kJ/mol  
99+
38,880.00 kJ/mol  
10
15th Energy Level
33,000.00 kJ/mol  
99+
41,987.00 kJ/mol  
99+
16th Energy Level
33,000.00 kJ/mol  
99+
109,480.00 kJ/mol  
1
17th Energy Level
1,129.00 kJ/mol  
19
118,100.00 kJ/mol  
2
18th Energy Level
0.00 kJ/mol  
99+
127,100.00 kJ/mol  
3
19th Energy Level
1,094.90 kJ/mol  
18
138,600.00 kJ/mol  
4
20th Energy Level
0.00 kJ/mol  
99+
148,500.00 kJ/mol  
6
21st Energy Level
883.00 kJ/mol  
36
158,600.00 kJ/mol  
6
22nd Energy Level
330.00 kJ/mol  
99+
172,500.00 kJ/mol  
5
23rd Energy Level
1,150.00 kJ/mol  
33
181,380.00 kJ/mol  
5
24th Energy Level
528.30 kJ/mol  
99+
650.90 kJ/mol  
34
25th Energy Level
0.00 kJ/mol  
99+
717.30 kJ/mol  
24
26th Energy Level
579.80 kJ/mol  
99+
650.90 kJ/mol  
35
27th Energy Level
0.00 kJ/mol  
99+
650.90 kJ/mol  
36
28th Energy Level
1,150.00 kJ/mol  
3
650.90 kJ/mol  
99+
29th Energy Level
1,094.00 kJ/mol  
5
650.90 kJ/mol  
99+
30th Energy Level
0.00 kJ/mol  
99+
650.90 kJ/mol  
38
Electrochemical Equivalent
3.00 g/amp-hr  
21
0.29 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.10 eV  
32
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
105  
13
25  
99+
Electron Configuration
[Rn] 5f14 6d3 7s2  
[Ar] 3d5 4s2  
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
25  
99+
Number of Neutrons
157  
8
30  
99+
Number of Electrons
105  
13
25  
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
127.00 pm  
99+
Covalent Radius
149.00 pm  
37
139.00 pm  
99+
Van der Waals Radius
0.00 pm  
99+
200.00 pm  
35
Atomic Weight
268.00 amu  
10
54.94 amu  
99+
Atomic Volume
22.80 cm3/mol  
17
1.39 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rutherfordium
  
Chromium
  
Next Element
Seaborgium
  
Iron
  
Valence Electron Potential
0.00 (-eV)  
99+
220.00 (-eV)  
2
Lattice Constant
-  
891.25 pm  
1
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.63  
14
1.55  
99+
Mechanical
Density
  
  
Density At Room Temperature
29.30 g/cm3  
5
7.21 g/cm3  
99+
Density When Liquid (at m.p.)
29.30 g/cm3  
6
5.95 g/cm3  
99+
Tensile Strength
0.10 MPa  
99+
370.00 MPa  
11
Viscosity
0.00  
25
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
12
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
34.00 GPa  
22
40.00 GPa  
19
Bulk Modulus
39.00 GPa  
39
120.00 GPa  
14
Young's Modulus
0.00 GPa  
99+
198.00 GPa  
13
Poisson Ratio
0.39  
5
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
39.00  
3
7.21  
99+
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
7
Susceptibility
0.00  
24
0.00  
12
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
6.80 nΩ·m  
99+
1.44 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
-  
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.48 J/(kg K)  
11
Molar Heat Capacity
29.30 J/mol·K  
11
26.32 J/mol·K  
37
Thermal Conductivity
0.00 W/m·K  
99+
7.81 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
1,519.00 K  
40
Thermal Expansion
13.20 µm/(m·K)  
37
21.70 µm/(m·K)  
22
Enthalpy
  
  
Enthalpy of Vaporization
289.70 kJ/mol  
99+
219.70 kJ/mol  
99+
Enthalpy of Fusion
-  
14.64 kJ/mol  
25
Enthalpy of Atomization
-  
280.30 kJ/mol  
99+
Standard Molar Entropy
55.00 J/mol.K  
34
32.00 J/mol.K  
99+
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