Bohrium vs Dubnium
Periodic Table
Symbol
Bh
Db
Group Number
7
11
5
13
Period Number
7
7
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
54037148
12
53850354
14
Space Group Name
Not Available
Not Available
Space Group Number
Not Available
Not Available
Facts
Interesting Facts
- Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
- IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.
- In the production of Dubnium, thermal gradient chromatography is used.
Sources
Found in Minerals, Mining, Synthetically Produced
Produced by Bombarding Am243 with Ne22, Synthetically Produced
History
Who Discovered
Gesellschaft für Schwerionenforschung
Joint Institute for Nuclear Research
Discovery
In 1981
In 1968
Abundance
Uses
Uses & Benefits
- Currently known uses of Bohrium metal are limited to research purpose only.
- Currently known uses of Dubnium metal are limited to research purpose only.
Industrial Uses
NA
NA
Medical Uses
NA
NA
Other Uses
Research Purposes
Research Purposes
Biological Properties
Present in Human Body
No
No
In Blood
0.00 Blood/mg dm-3
37
0.00 Blood/mg dm-3
37
In Bone
0.00 p.p.m.
36
0.00 p.p.m.
36
Physical Properties
Melting Point
Not Available
Not Available
Boiling Point
Not Available
Not Available
Appearance
Physical State
Solid
Solid
Luster
Unknown Luster
Unknown Luster
Hardness
Speed of Sound
Not Available
Not Available
Optical Properties
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Bh
Db
Isotopes
Known Isotopes
5
32
10
28
Electronegativity
Electropositivity
Ionization Energies
1st Energy Level
742.90 kJ/mol
23
664.80 kJ/mol
38
2nd Energy Level
1,688.50 kJ/mol
30
1,546.70 kJ/mol
38
3rd Energy Level
2,566.50 kJ/mol
99+
2,378.40 kJ/mol
99+
4th Energy Level
3,598.90 kJ/mol
99+
3,298.80 kJ/mol
99+
5th Energy Level
4,727.80 kJ/mol
37
4,305.20 kJ/mol
39
6th Energy Level
5,991.70 kJ/mol
24
Not Available
7th Energy level
7,226.80 kJ/mol
22
Not Available
Electrochemical Equivalent
Not Available
Not Available
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes
Ionization, Radioactive Isotopes, Radioactivity
Atomic Properties
Atomic Number
107
11
105
13
Electron Configuration
[Rn] 5f14 6d5 7s2
[Rn] 5f14 6d3 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
107
11
105
13
Number of Neutrons
155
8
157
7
Number of Electrons
107
11
105
13
Radius of an Atom
Atomic Radius
128.00 pm
99+
139.00 pm
39
Covalent Radius
141.00 pm
99+
149.00 pm
35
Atomic Weight
270.00 amu
8
268.00 amu
10
Atomic Volume
Not Available
Not Available
Adjacent Atomic Numbers
Valence Electron Potential
Not Available
Not Available
Lattice Constant
Not Available
Not Available
Lattice Angles
NA
NA
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
37.10 g/cm3
3
29.30 g/cm3
5
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Elasticity properties
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
Unknown
Unknown
Magnetic Properties
Magnetic Characteristics
Electrical Properties
Thermal Properties
Specific Heat
Not Available
Not Available
Molar Heat Capacity
Not Available
Not Available
Thermal Conductivity
Not Available
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
Not Available
Enthalpy
Standard Molar Entropy
Not Available
Not Available
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