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Roentgenium vs Meitnerium

Roentgenium
Meitnerium
Meitnerium vs Roentgenium


Periodic Table
Symbol
Rg  
Mt  
Group Number
11  
7
9  
9
Period Number
7  
7  
Block
d block  
d block  
Element Family
-  
Probably Transition  
CAS Number
54386242  
1
54038016  
10
Space Group Name
-  
-  
Space Group Number
194.00  
7
166.00  
9
Facts
Interesting Facts
Roentgenium is a highly unstable synthetic element.  
Meitnerium is named after Lise Meitner, an Austrian physicist.  
Sources
Synthetically Produced  
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Gesellschaft für Schwerionenforschung  
Discovery
In 1994  
In 1982  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
-  
-  
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
-  
-  
Abundance In Oceans
-  
-  
Abundance In Humans
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Roentgenium metal are limited to research purpose only.
  
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Research Purposes  
-  
Biological Properties
  
  
Toxicity
-  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
-  
Boiling Point
2,800.00 °C  
38
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
-  
Luster
Unknown Luster  
Unknown Luster  
Hardness
  
  
Mohs Hardness
-  
-  
Brinell Hardness
700.00 MPa  
17
400.00 MPa  
34
Vickers Hardness
450.00 MPa  
38
350.00 MPa  
99+
Speed of Sound
3,430.00 m/s  
32
3,200.00 m/s  
35
Optical Properties
  
  
Refractive Index
1.30  
99+
1.30  
99+
Reflectivity
64.00 %  
19
68.00 %  
15
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rg  
Mt  
Isotopes
  
  
Known Isotopes
1  
34
4  
33
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
1.30  
33
Sanderson Electronegativity
1.90  
13
1.90  
13
Allred Rochow Electronegativity
1.30  
25
1.30  
25
Mulliken-Jaffe Electronegativity
0.90  
99+
1.30  
33
Allen Electronegativity
0.80  
99+
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.00  
99+
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol  
3
800.80 kJ/mol  
15
2nd Energy Level
2,074.40 kJ/mol  
10
1,823.60 kJ/mol  
18
3rd Energy Level
3,077.90 kJ/mol  
24
2,904.20 kJ/mol  
31
4th Energy Level
4,052.40 kJ/mol  
99+
3,859.40 kJ/mol  
99+
5th Energy Level
5,306.70 kJ/mol  
99+
4,920.80 kJ/mol  
99+
6th Energy Level
11,100.00 kJ/mol  
10
8,000.00 kJ/mol  
34
7th Energy level
5,800.00 kJ/mol  
99+
8,000.00 kJ/mol  
28
8th Energy Level
5,800.00 kJ/mol  
99+
8,000.00 kJ/mol  
28
9th Energy Level
5,650.00 kJ/mol  
99+
6,700.00 kJ/mol  
36
10th Energy Level
5,800.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
11th Energy Level
8,300.00 kJ/mol  
24
6,300.00 kJ/mol  
99+
12th Energy Level
8,300.00 kJ/mol  
99+
0.00 kJ/mol  
99+
13th Energy Level
8,700.00 kJ/mol  
16
8,000.00 kJ/mol  
20
14th Energy Level
8,300.00 kJ/mol  
16
1,156.00 kJ/mol  
99+
15th Energy Level
87,000.00 kJ/mol  
9
80,000.00 kJ/mol  
17
16th Energy Level
83,000.00 kJ/mol  
11
58,700.00 kJ/mol  
39
17th Energy Level
830.80 kJ/mol  
30
1,110.00 kJ/mol  
20
18th Energy Level
8,300.00 kJ/mol  
19
8,000.00 kJ/mol  
23
19th Energy Level
580.00 kJ/mol  
99+
1,110.00 kJ/mol  
17
20th Energy Level
580.00 kJ/mol  
99+
850.00 kJ/mol  
18
21st Energy Level
5,800.00 kJ/mol  
21
800.00 kJ/mol  
99+
22nd Energy Level
580.00 kJ/mol  
99+
380.00 kJ/mol  
99+
23rd Energy Level
5,800.00 kJ/mol  
21
8,000.00 kJ/mol  
9
24th Energy Level
538.70 kJ/mol  
99+
565.60 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
800.00 kJ/mol  
13
26th Energy Level
580.00 kJ/mol  
99+
800.00 kJ/mol  
13
27th Energy Level
580.00 kJ/mol  
99+
800.00 kJ/mol  
12
28th Energy Level
880.00 kJ/mol  
8
800.00 kJ/mol  
18
29th Energy Level
580.00 kJ/mol  
99+
800.00 kJ/mol  
18
30th Energy Level
0.00 kJ/mol  
99+
800.00 kJ/mol  
13
Electrochemical Equivalent
3.10 g/amp-hr  
18
3.00 g/amp-hr  
21
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
-  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
111  
7
109  
9
Electron Configuration
[Rn] 5f14 6d9 7s2  
[Rn] 5f14 6d7 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Meitnerium.jpg#100  
Atom
  
  
Number of Protons
111  
7
109  
9
Number of Neutrons
161  
4
157  
8
Number of Electrons
111  
7
109  
9
Radius of an Atom
  
  
Atomic Radius
200.00 pm  
7
122.00 pm  
99+
Covalent Radius
126.00 pm  
99+
129.00 pm  
99+
Van der Waals Radius
280.00 pm  
6
260.00 pm  
9
Atomic Weight
281.00 amu  
6
278.00 amu  
7
Atomic Volume
28.70 cm3/mol  
12
20.20 cm3/mol  
30
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Hassium
  
Next Element
Copernicium
  
Darmstadtium
  
Valence Electron Potential
11.90 (-eV)  
99+
31.20 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
0.00 pm  
99+
Lattice Angles
-  
-  
Lattice C/A Ratio
1.90  
1
1.59  
27
Mechanical
Density
  
  
Density At Room Temperature
28.70 g/cm3  
6
37.40 g/cm3  
2
Density When Liquid (at m.p.)
28.70 g/cm3  
7
37.40 g/cm3  
2
Tensile Strength
65.00 MPa  
33
80.00 MPa  
29
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
35.00 GPa  
21
Bulk Modulus
0.00 GPa  
99+
0.00 GPa  
99+
Young's Modulus
12.70 GPa  
99+
13.50 GPa  
99+
Poisson Ratio
0.30  
14
0.25  
24
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
28.70  
8
37.40  
4
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
12
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.20 nΩ·m  
99+
0.35 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
50.00 kJ/mol  
26
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.10 J/(kg K)  
99+
Molar Heat Capacity
23.70 J/mol·K  
99+
27.00 J/mol·K  
29
Thermal Conductivity
0.10 W/m·K  
99+
0.00 W/m·K  
99+
Critical Temperature
1,100.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
12.60 µm/(m·K)  
40
10.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
110.00 kJ/mol  
99+
Enthalpy of Fusion
-  
-  
Enthalpy of Atomization
580.00 kJ/mol  
14
350.20 kJ/mol  
37
Standard Molar Entropy
57.00 J/mol.K  
30
63.80 J/mol.K  
22
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