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Lawrencium vs Roentgenium

Lawrencium
Roentgenium
Roentgenium vs Lawrencium


Periodic Table
Symbol
Lr   
Rg   
Group Number
Not Available   
11   
7
Period Number
7   
7   
Block
d block   
d block   
Element Family
Actinide   
Unknown   
CAS Number
22537195   
15
54386242   
1
Space Group Name
Not Available   
Not Available   
Space Group Number
Not Available   
194.00   
5
Facts
Interesting Facts
  • It is synthetically produced metal.
  • Radiation hazard can be produce by it.
  
Not Available   
Sources
Bombarding Californium-252 with Boron Nuclei, 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 1994   
Abundance
  
  
Uses
Uses & Benefits
  • Currently known uses of Lawrencium metal are limited to research purpose only.
  
  • Currently known uses of Roentgenium 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   
Silver   
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   
Rg   
Isotopes
  
  
Known Isotopes
10   
28
1   
34
Electronegativity
  
  
Electropositivity
  
  
Ionization Energies
  
  
1st Energy Level
470.00 kJ/mol   
99+
1,022.70 kJ/mol   
3
2nd Energy Level
1,428.00 kJ/mol   
99+
2,074.40 kJ/mol   
10
3rd Energy Level
2,228.00 kJ/mol   
99+
3,077.90 kJ/mol   
24
4th Energy Level
4,910.00 kJ/mol   
21
4,052.40 kJ/mol   
36
5th Energy Level
Not Available   
5,306.70 kJ/mol   
31
Electrochemical Equivalent
3.23 g/amp-hr   
11
Not Available   
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes   
NA   
Atomic Properties
Atomic Number
103   
15
111   
7
Electron Configuration
[Rn] 5f14 7s2 7p1   
[Rn] 5f14 6d9 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
103   
15
111   
7
Number of Neutrons
157   
7
161   
3
Number of Electrons
103   
15
111   
7
Radius of an Atom
  
  
Van der Waals Radius
246.00 pm   
8
Not Available   
Atomic Weight
266.00 amu   
12
281.00 amu   
6
Atomic Volume
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Nobelium
  
Darmstadtium
  
Next Element
Rutherfordium
  
Copernicium
  
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   
28.70 g/cm3   
6
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   
Periodic Table >>
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