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Lawrencium Roentgenium Comparison


Roentgenium Lawrencium comparison


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
  

Next Element

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   

Summary >>
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