Symbol
Bh
  
Mn
  
Period Number
7
  
4
  
Block
d block
  
d block
  
Element Family
Transition Metal
  
Transition Metal
  
Space Group Name
Not Available
  
I_ 43m
  
Space Group Number
Not Available
  
Interesting Facts
- Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
- Manganese is an essential trace element in all forms of life.
- Manganese metal oxidizes very easily, but it does not fuse that easily.
  
Sources
Found in Minerals, Mining, Synthetically Produced
  
Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung
  
Johann Gottlieb Gahn
  
Discovery
In 1981
  
In 1774
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available
  
Abundance In Humans
Not Available
  
Uses & Benefits
- Currently known uses of Bohrium 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
NA
  
Automobile Industry, Electrical Industry, Electronic Industry
  
Medical Uses
NA
  
NA
  
Other Uses
Research Purposes
  
Alloys
  
Biological Properties
  
  
Toxicity
Unknown
  
Toxic
  
Present in Human Body
No
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
37
0.08 Blood/mg dm-3
  
14
In Bone
0.00 p.p.m.
  
36
100.00 p.p.m.
  
8
Melting Point
Not Available
  
1,245.00 °C
  
37
Boiling Point
Not Available
  
1,962.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Unknown
  
Silver
  
Luster
Unknown Luster
  
Metallic
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
196.00 MPa
  
99+
Speed of Sound
Not Available
  
5,150.00 m/s
  
7
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Bh
  
Mn
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Not Available
  
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
742.90 kJ/mol
  
23
717.30 kJ/mol
  
30
2nd Energy Level
1,688.50 kJ/mol
  
30
1,509.00 kJ/mol
  
39
3rd Energy Level
2,566.50 kJ/mol
  
99+
3,248.00 kJ/mol
  
21
4th Energy Level
3,598.90 kJ/mol
  
99+
4,940.00 kJ/mol
  
20
5th Energy Level
4,727.80 kJ/mol
  
37
6,990.00 kJ/mol
  
17
6th Energy Level
5,991.70 kJ/mol
  
24
9,220.00 kJ/mol
  
16
7th Energy level
7,226.80 kJ/mol
  
22
11,500.00 kJ/mol
  
16
8th Energy Level
Not Available
  
18,770.00 kJ/mol
  
5
9th Energy Level
Not Available
  
21,400.00 kJ/mol
  
6
10th Energy Level
Not Available
  
23,960.00 kJ/mol
  
9
11th Energy Level
Not Available
  
27,590.00 kJ/mol
  
10
12th Energy Level
Not Available
  
30,330.00 kJ/mol
  
10
13th Energy Level
Not Available
  
33,150.00 kJ/mol
  
11
14th Energy Level
Not Available
  
38,880.00 kJ/mol
  
10
15th Energy Level
Not Available
  
41,987.00 kJ/mol
  
13
16th Energy Level
Not Available
  
109,480.00 kJ/mol
  
1
17th Energy Level
Not Available
  
118,100.00 kJ/mol
  
2
18th Energy Level
Not Available
  
127,100.00 kJ/mol
  
3
19th Energy Level
Not Available
  
138,600.00 kJ/mol
  
4
20th Energy Level
Not Available
  
148,500.00 kJ/mol
  
6
21st Energy Level
Not Available
  
158,600.00 kJ/mol
  
6
22nd Energy Level
Not Available
  
172,500.00 kJ/mol
  
5
23rd Energy Level
Not Available
  
181,380.00 kJ/mol
  
5
Electrochemical Equivalent
Not Available
  
0.29 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes
  
Ionization, Radioactive Isotopes
  
Electron Configuration
[Rn] 5f14 6d5 7s2
  
[Ar] 3d5 4s2
  
Crystal Structure
Hexagonal Close Packed (HCP)
  
Body Centered Cubic (BCC)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Van der Waals Radius
Not Available
  
Atomic Volume
Not Available
  
1.39 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
220.00 (-eV)
  
2
Lattice Constant
Not Available
  
Lattice Angles
NA
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
7.21 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
5.95 g/cm3
  
99+
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Elasticity properties
  
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Not Available
  
Other Mechanical Properties
Unknown
  
NA
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Unknown
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Conductor
  
Resistivity
Not Available
  
Electrical Conductivity
Not Available
  
0.01 10
6/cm Ω
  
99+
Electron Affinity
Not Available
  
0.00 kJ/mol
  
40
Specific Heat
Not Available
  
0.48 J/(kg K)
  
11
Molar Heat Capacity
Not Available
  
26.32 J/mol·K
  
29
Thermal Conductivity
Not Available
  
7.81 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
21.70 µm/(m·K)
  
21
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
219.70 kJ/mol
  
99+
Enthalpy of Fusion
Not Available
  
14.64 kJ/mol
  
23
Enthalpy of Atomization
Not Available
  
280.30 kJ/mol
  
38
Standard Molar Entropy
Not Available
  
32.00 J/mol.K
  
99+