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Lawrencium vs Radium

Lawrencium
Radium
Radium vs Lawrencium


Periodic Table
Symbol
Lr   
Ra   
Group Number
Not Available   
2   
16
Period Number
7   
7   
Block
d block   
s block   
Element Family
Actinide   
Alkaline Earth   
CAS Number
22537195   
15
7440144   
99+
Space Group Name
Not Available   
Im_ 3m   
Space Group Number
Not Available   
229.00   
1
Facts
Interesting Facts
  • It is synthetically produced metal.
  • Radiation hazard can be produce by it.
  
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Sources
Bombarding Californium-252 with Boron Nuclei, Found in Minerals, Mining   
Mining, Ores of metals   
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research   
Not Available   
Discovery
In 1961–1971   
In 1898   
Abundance
  
  
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
99+
Abundance In Humans
Not Available   
0.00 %   
20
Uses
Uses & Benefits
  • Currently known uses of Lawrencium metal are limited to research purpose only.
  
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
Pharmaceutical Industry   
Other Uses
NA   
NA   
Biological Properties
  
  
Toxicity
Unknown   
Highly Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
Not Available   
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
1,627.00 °C   
20
700.00 °C   
99+
Boiling Point
Not Available   
1,737.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silvery White   
Luster
Unknown Luster   
Metallic   
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   
Ra   
Isotopes
  
  
Known Isotopes
10   
28
33   
6
Electronegativity
  
  
Pauling Electronegativity
Not Available   
0.90   
99+
Allred Rochow Electronegativity
Not Available   
0.97   
38
Mulliken-Jaffe Electronegativity
Not Available   
0.92   
20
Allen Electronegativity
Not Available   
0.89   
99+
Electropositivity
  
  
Pauling Electropositivity
Not Available   
3.10   
5
Ionization Energies
  
  
1st Energy Level
470.00 kJ/mol   
99+
509.30 kJ/mol   
99+
2nd Energy Level
1,428.00 kJ/mol   
99+
979.00 kJ/mol   
99+
3rd Energy Level
2,228.00 kJ/mol   
99+
Not Available   
4th Energy Level
4,910.00 kJ/mol   
21
Not Available   
Electrochemical Equivalent
3.23 g/amp-hr   
11
4.22 g/amp-hr   
6
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
103   
15
88   
30
Electron Configuration
[Rn] 5f14 7s2 7p1   
[Rn] 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
88   
30
Number of Neutrons
157   
7
138   
16
Number of Electrons
103   
15
88   
30
Radius of an Atom
  
  
Covalent Radius
Not Available   
221.00 pm   
3
Van der Waals Radius
246.00 pm   
8
283.00 pm   
4
Atomic Weight
266.00 amu   
12
226.00 amu   
26
Atomic Volume
Not Available   
45.20 cm3/mol   
4
Adjacent Atomic Numbers
  
  
Previous Element
Nobelium
  
Francium
  
Next Element
Rutherfordium
  
Actinium
  
Valence Electron Potential
Not Available   
20.10 (-eV)   
99+
Lattice Constant
Not Available   
514.80 pm   
13
Lattice Angles
NA   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
Not Available   
5.50 g/cm3   
99+
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   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
5.00   
99+
Magnetic Ordering
Unknown   
Nonmagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
NA   
Resistivity
Not Available   
100.00 nΩ·m   
31
Thermal Properties
Specific Heat
Not Available   
0.12 J/(kg K)   
40
Molar Heat Capacity
Not Available   
Not Available   
Thermal Conductivity
Not Available   
18.60 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
Not Available   
Enthalpy
  
  
Enthalpy of Atomization
Not Available   
163.00 kJ/mol   
99+
Standard Molar Entropy
Not Available   
71.00 J/mol.K   
14
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