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Meitnerium Bohrium Comparison

Meitnerium
Bohrium
Bohrium Meitnerium comparison


Periodic Table
Symbol
Mt  
Bh  
Group Number
9  
9
7  
11
Period Number
7  
7  
Block
d block  
d block  
Element Family
Probably Transition  
Transition Metal  
CAS Number
54038016  
10
54037148  
12
Space Group Name
-  
-  
Space Group Number
166.00  
9
276.00  
1
Facts
Interesting Facts
Meitnerium is named after Lise Meitner, an Austrian physicist.  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced  
Found in Minerals, Mining, Synthetically Produced  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Gesellschaft für Schwerionenforschung  
Discovery
In 1982  
In 1981  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
37
Abundance In Sun
-  
-  
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
  • Currently known uses of Bohrium 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
0.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
-  
Luster
Unknown Luster  
Unknown Luster  
Hardness
  
  
Mohs Hardness
-  
7.00  
3
Brinell Hardness
400.00 MPa  
34
270.00 MPa  
99+
Vickers Hardness
350.00 MPa  
99+
2,700.00 MPa  
4
Speed of Sound
3,200.00 m/s  
35
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.50  
36
Reflectivity
68.00 %  
15
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Mt  
Bh  
Isotopes
  
  
Known Isotopes
4  
33
5  
32
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.00  
8
Sanderson Electronegativity
1.90  
13
1.30  
25
Allred Rochow Electronegativity
1.30  
25
1.30  
25
Mulliken-Jaffe Electronegativity
1.30  
33
1.30  
33
Allen Electronegativity
1.30  
40
2.00  
6
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
2.00  
99+
Ionization Energies
  
  
1st Energy Level
800.80 kJ/mol  
15
742.90 kJ/mol  
23
2nd Energy Level
1,823.60 kJ/mol  
18
1,688.50 kJ/mol  
31
3rd Energy Level
2,904.20 kJ/mol  
31
2,566.50 kJ/mol  
99+
4th Energy Level
3,859.40 kJ/mol  
99+
3,598.90 kJ/mol  
99+
5th Energy Level
4,920.80 kJ/mol  
99+
4,727.80 kJ/mol  
99+
6th Energy Level
8,000.00 kJ/mol  
34
5,991.70 kJ/mol  
99+
7th Energy level
8,000.00 kJ/mol  
28
7,226.80 kJ/mol  
34
8th Energy Level
8,000.00 kJ/mol  
28
7,100.00 kJ/mol  
33
9th Energy Level
6,700.00 kJ/mol  
36
5,800.00 kJ/mol  
99+
10th Energy Level
5,800.00 kJ/mol  
99+
7,100.00 kJ/mol  
35
11th Energy Level
6,300.00 kJ/mol  
99+
8,200.00 kJ/mol  
25
12th Energy Level
0.00 kJ/mol  
99+
82,700.00 kJ/mol  
4
13th Energy Level
8,000.00 kJ/mol  
20
7,100.00 kJ/mol  
29
14th Energy Level
1,156.00 kJ/mol  
99+
8,200.00 kJ/mol  
17
15th Energy Level
80,000.00 kJ/mol  
17
82,000.00 kJ/mol  
14
16th Energy Level
58,700.00 kJ/mol  
39
71,100.00 kJ/mol  
20
17th Energy Level
1,110.00 kJ/mol  
20
820.00 kJ/mol  
31
18th Energy Level
8,000.00 kJ/mol  
23
8,200.00 kJ/mol  
20
19th Energy Level
1,110.00 kJ/mol  
17
820.80 kJ/mol  
28
20th Energy Level
850.00 kJ/mol  
18
820.00 kJ/mol  
21
21st Energy Level
800.00 kJ/mol  
99+
8,200.00 kJ/mol  
11
22nd Energy Level
380.00 kJ/mol  
99+
820.00 kJ/mol  
16
23rd Energy Level
8,000.00 kJ/mol  
9
8,200.00 kJ/mol  
8
24th Energy Level
565.60 kJ/mol  
99+
820.00 kJ/mol  
12
25th Energy Level
800.00 kJ/mol  
13
820.00 kJ/mol  
10
26th Energy Level
800.00 kJ/mol  
13
820.00 kJ/mol  
10
27th Energy Level
800.00 kJ/mol  
12
820.00 kJ/mol  
9
28th Energy Level
800.00 kJ/mol  
18
820.00 kJ/mol  
15
29th Energy Level
800.00 kJ/mol  
18
820.00 kJ/mol  
14
30th Energy Level
800.00 kJ/mol  
13
820.00 kJ/mol  
10
Electrochemical Equivalent
3.00 g/amp-hr  
21
3.00 g/amp-hr  
21
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
109  
9
107  
11
Electron Configuration
[Rn] 5f14 6d7 7s2  
[Rn] 5f14 6d5 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Meitnerium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
109  
9
107  
11
Number of Neutrons
157  
8
155  
9
Number of Electrons
109  
9
107  
11
Radius of an Atom
  
  
Atomic Radius
122.00 pm  
99+
128.00 pm  
99+
Covalent Radius
129.00 pm  
99+
141.00 pm  
99+
Van der Waals Radius
260.00 pm  
9
0.00 pm  
99+
Atomic Weight
278.00 amu  
7
270.00 amu  
8
Atomic Volume
20.20 cm3/mol  
30
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Hassium
  
Seaborgium
  
Next Element
Darmstadtium
  
Hassium
  
Valence Electron Potential
31.20 (-eV)  
99+
27.20 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.59  
27
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
37.40 g/cm3  
2
37.10 g/cm3  
3
Density When Liquid (at m.p.)
37.40 g/cm3  
2
37.10 g/cm3  
3
Tensile Strength
80.00 MPa  
29
152.00 MPa  
24
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)  
37
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
35.00 GPa  
21
28.00 GPa  
32
Bulk Modulus
0.00 GPa  
99+
37.00 GPa  
99+
Young's Modulus
13.50 GPa  
99+
0.00 GPa  
99+
Poisson Ratio
0.25  
24
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
37.40  
4
37.00  
5
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
12
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.35 nΩ·m  
99+
6.50 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
-  
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.10 J/(kg K)  
99+
Molar Heat Capacity
27.00 J/mol·K  
29
37.10 J/mol·K  
2
Thermal Conductivity
0.00 W/m·K  
99+
37.00 W/m·K  
36
Critical Temperature
1,323.00 K  
99+
1,323.00 K  
99+
Thermal Expansion
10.30 µm/(m·K)  
99+
14.30 µm/(m·K)  
28
Enthalpy
  
  
Enthalpy of Vaporization
110.00 kJ/mol  
99+
270.50 kJ/mol  
99+
Enthalpy of Fusion
-  
-  
Enthalpy of Atomization
350.20 kJ/mol  
37
-  
Standard Molar Entropy
63.80 J/mol.K  
22
57.00 J/mol.K  
30
Summary >>
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