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Roentgenium vs Manganese

Roentgenium
Manganese
Manganese vs Roentgenium


Periodic Table
Symbol
Rg  
Mn  
Group Number
11  
7
7  
11
Period Number
7  
4  
Block
d block  
d block  
Element Family
-  
Transition Metal  
CAS Number
54386242  
1
7439965  
99+
Space Group Name
-  
I_ 43m  
Space Group Number
194.00  
7
217.00  
5
Facts
Interesting Facts
Roentgenium is a highly unstable synthetic element.  
  • Manganese is an essential trace element in all forms of life.
  • Manganese metal oxidizes very easily, but it does not fuse that easily.
  
Sources
Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Johann Gottlieb Gahn  
Discovery
In 1994  
In 1774  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
9
Abundance In Sun
-  
0.00 %  
8
Abundance In Meteorites
-  
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 Roentgenium 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
2,800.00 °C  
38
1,962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silver  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
-  
6.00  
6
Brinell Hardness
700.00 MPa  
17
196.00 MPa  
99+
Vickers Hardness
450.00 MPa  
38
196.00 MPa  
99+
Speed of Sound
3,430.00 m/s  
32
5,150.00 m/s  
11
Optical Properties
  
  
Refractive Index
1.30  
99+
2.00  
15
Reflectivity
64.00 %  
19
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rg  
Mn  
Isotopes
  
  
Known Isotopes
1  
34
21  
18
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
1.55  
26
Sanderson Electronegativity
1.90  
13
2.20  
8
Allred Rochow Electronegativity
1.30  
25
1.60  
10
Mulliken-Jaffe Electronegativity
0.90  
99+
1.55  
23
Allen Electronegativity
0.80  
99+
1.75  
18
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.45  
29
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol  
3
717.30 kJ/mol  
30
2nd Energy Level
2,074.40 kJ/mol  
10
1,509.00 kJ/mol  
40
3rd Energy Level
3,077.90 kJ/mol  
24
3,248.00 kJ/mol  
21
4th Energy Level
4,052.40 kJ/mol  
99+
4,940.00 kJ/mol  
30
5th Energy Level
5,306.70 kJ/mol  
99+
6,990.00 kJ/mol  
29
6th Energy Level
11,100.00 kJ/mol  
10
9,220.00 kJ/mol  
22
7th Energy level
5,800.00 kJ/mol  
99+
11,500.00 kJ/mol  
16
8th Energy Level
5,800.00 kJ/mol  
99+
18,770.00 kJ/mol  
5
9th Energy Level
5,650.00 kJ/mol  
99+
21,400.00 kJ/mol  
6
10th Energy Level
5,800.00 kJ/mol  
99+
23,960.00 kJ/mol  
9
11th Energy Level
8,300.00 kJ/mol  
24
27,590.00 kJ/mol  
10
12th Energy Level
8,300.00 kJ/mol  
99+
30,330.00 kJ/mol  
32
13th Energy Level
8,700.00 kJ/mol  
16
33,150.00 kJ/mol  
11
14th Energy Level
8,300.00 kJ/mol  
16
38,880.00 kJ/mol  
10
15th Energy Level
87,000.00 kJ/mol  
9
41,987.00 kJ/mol  
99+
16th Energy Level
83,000.00 kJ/mol  
11
109,480.00 kJ/mol  
1
17th Energy Level
830.80 kJ/mol  
30
118,100.00 kJ/mol  
2
18th Energy Level
8,300.00 kJ/mol  
19
127,100.00 kJ/mol  
3
19th Energy Level
580.00 kJ/mol  
99+
138,600.00 kJ/mol  
4
20th Energy Level
580.00 kJ/mol  
99+
148,500.00 kJ/mol  
6
21st Energy Level
5,800.00 kJ/mol  
21
158,600.00 kJ/mol  
6
22nd Energy Level
580.00 kJ/mol  
99+
172,500.00 kJ/mol  
5
23rd Energy Level
5,800.00 kJ/mol  
21
181,380.00 kJ/mol  
5
24th Energy Level
538.70 kJ/mol  
99+
650.90 kJ/mol  
34
25th Energy Level
0.00 kJ/mol  
99+
717.30 kJ/mol  
24
26th Energy Level
580.00 kJ/mol  
99+
650.90 kJ/mol  
35
27th Energy Level
580.00 kJ/mol  
99+
650.90 kJ/mol  
36
28th Energy Level
880.00 kJ/mol  
8
650.90 kJ/mol  
99+
29th Energy Level
580.00 kJ/mol  
99+
650.90 kJ/mol  
99+
30th Energy Level
0.00 kJ/mol  
99+
650.90 kJ/mol  
38
Electrochemical Equivalent
3.10 g/amp-hr  
18
0.29 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.10 eV  
32
Other Chemical Properties
-  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
111  
7
25  
99+
Electron Configuration
[Rn] 5f14 6d9 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
111  
7
25  
99+
Number of Neutrons
161  
4
30  
99+
Number of Electrons
111  
7
25  
99+
Radius of an Atom
  
  
Atomic Radius
200.00 pm  
7
127.00 pm  
99+
Covalent Radius
126.00 pm  
99+
139.00 pm  
99+
Van der Waals Radius
280.00 pm  
6
200.00 pm  
35
Atomic Weight
281.00 amu  
6
54.94 amu  
99+
Atomic Volume
28.70 cm3/mol  
12
1.39 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Chromium
  
Next Element
Copernicium
  
Iron
  
Valence Electron Potential
11.90 (-eV)  
99+
220.00 (-eV)  
2
Lattice Constant
0.00 pm  
99+
891.25 pm  
1
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.90  
1
1.55  
99+
Mechanical
Density
  
  
Density At Room Temperature
28.70 g/cm3  
6
7.21 g/cm3  
99+
Density When Liquid (at m.p.)
28.70 g/cm3  
7
5.95 g/cm3  
99+
Tensile Strength
65.00 MPa  
33
370.00 MPa  
11
Viscosity
0.00  
25
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
12
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
40.00 GPa  
19
Bulk Modulus
0.00 GPa  
99+
120.00 GPa  
14
Young's Modulus
12.70 GPa  
99+
198.00 GPa  
13
Poisson Ratio
0.30  
14
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
28.70  
8
7.21  
99+
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
7
Susceptibility
0.00  
24
0.00  
12
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.20 nΩ·m  
99+
1.44 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.48 J/(kg K)  
11
Molar Heat Capacity
23.70 J/mol·K  
99+
26.32 J/mol·K  
37
Thermal Conductivity
0.10 W/m·K  
99+
7.81 W/m·K  
99+
Critical Temperature
1,100.00 K  
99+
1,519.00 K  
40
Thermal Expansion
12.60 µm/(m·K)  
40
21.70 µm/(m·K)  
22
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
219.70 kJ/mol  
99+
Enthalpy of Fusion
-  
14.64 kJ/mol  
25
Enthalpy of Atomization
580.00 kJ/mol  
14
280.30 kJ/mol  
99+
Standard Molar Entropy
57.00 J/mol.K  
30
32.00 J/mol.K  
99+
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