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Bohrium vs Meitnerium

Bohrium
Meitnerium
Meitnerium vs Bohrium


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