Lawrencium vs Bohrium
Periodic Table
Symbol
Lr
Bh
Group Number
Not Available
7
11
Period Number
7
7
Block
d block
d block
Element Family
Actinide
Transition Metal
CAS Number
22537195
15
54037148
12
Space Group Name
Not Available
Not Available
Space Group Number
Not Available
Not Available
Facts
Interesting Facts
- It is synthetically produced metal.
- Radiation hazard can be produce by it.
- Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
Sources
Bombarding Californium-252 with Boron Nuclei, Found in Minerals, Mining
Found in Minerals, Mining, Synthetically Produced
History
Who Discovered
Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research
Gesellschaft für Schwerionenforschung
Discovery
In 1961–1971
In 1981
Abundance
Uses
Uses & Benefits
- Currently known uses of Lawrencium metal are limited to research purpose only.
- Currently known uses of Bohrium metal are limited to research purpose only.
Industrial Uses
NA
NA
Medical Uses
NA
NA
Other Uses
NA
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
1,627.00 °C
20
Not Available
Boiling Point
Not Available
Not Available
Appearance
Physical State
Solid
Solid
Color
Silver
Unknown
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
Lr
Bh
Isotopes
Known Isotopes
10
28
5
32
Electronegativity
Electropositivity
Ionization Energies
1st Energy Level
470.00 kJ/mol
99+
742.90 kJ/mol
23
2nd Energy Level
1,428.00 kJ/mol
99+
1,688.50 kJ/mol
30
3rd Energy Level
2,228.00 kJ/mol
99+
2,566.50 kJ/mol
99+
4th Energy Level
4,910.00 kJ/mol
21
3,598.90 kJ/mol
99+
5th Energy Level
Not Available
4,727.80 kJ/mol
37
6th Energy Level
Not Available
5,991.70 kJ/mol
24
7th Energy level
Not Available
7,226.80 kJ/mol
22
Electrochemical Equivalent
3.23 g/amp-hr
11
Not Available
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
103
15
107
11
Electron Configuration
[Rn] 5f14 7s2 7p1
[Rn] 5f14 6d5 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
103
15
107
11
Number of Neutrons
157
7
155
8
Number of Electrons
103
15
107
11
Radius of an Atom
Atomic Radius
Not Available
128.00 pm
99+
Covalent Radius
Not Available
141.00 pm
99+
Van der Waals Radius
246.00 pm
8
Not Available
Atomic Weight
266.00 amu
12
270.00 amu
8
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
Not Available
37.10 g/cm3
3
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Elasticity properties
Poisson Ratio
0.32
12
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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