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Lawrencium vs Curium

Lawrencium
Curium
Curium vs Lawrencium


Periodic Table
Symbol
Lr  
Cm  
Group Number
Not Available  
Not Available  
Period Number
7  
7  
Block
d block  
f block  
Element Family
Actinide  
Actinide  
CAS Number
22537195  
15
7440519  
36
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.
  
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
Sources
Bombarding Californium-252 with Boron Nuclei, Found in Minerals, Mining  
Bombarding Plutonium with Helium Ions  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research  
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso  
Discovery
In 1961–1971  
In 1944  
Abundance
  
  
Uses
Uses & Benefits
  • Currently known uses of Lawrencium metal are limited to research purpose only.
  
  • Curium metal is used to provide power to electrical equipment for space missions.
  
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
1,340.00 °C  
34
Boiling Point
Not Available  
3,110.00 °C  
30
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silver  
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  
Cm  
Isotopes
  
  
Known Isotopes
10  
28
15  
24
Electronegativity
  
  
Pauling Electronegativity
Not Available  
1.30  
32
Allred Rochow Electronegativity
Not Available  
1.20  
27
Electropositivity
  
  
Pauling Electropositivity
Not Available  
2.70  
22
Ionization Energies
  
  
1st Energy Level
470.00 kJ/mol  
99+
581.00 kJ/mol  
99+
2nd Energy Level
1,428.00 kJ/mol  
99+
1,196.00 kJ/mol  
99+
3rd Energy Level
2,228.00 kJ/mol  
99+
2,026.00 kJ/mol  
99+
4th Energy Level
4,910.00 kJ/mol  
21
3,550.00 kJ/mol  
99+
Electrochemical Equivalent
3.23 g/amp-hr  
11
3.07 g/amp-hr  
16
Electron Work Function
Not Available  
Not Available  
Other Chemical Properties
Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes  
Atomic Properties
Atomic Number
103  
15
96  
22
Electron Configuration
[Rn] 5f14 7s2 7p1  
[Rn] 5f7 6d1 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
DHCP-Crystal-Structure-of-Curium.jpg#100  
Atom
  
  
Number of Protons
103  
15
96  
22
Number of Neutrons
157  
7
151  
10
Number of Electrons
103  
15
96  
22
Radius of an Atom
  
  
Atomic Radius
Not Available  
174.00 pm  
20
Covalent Radius
Not Available  
169.00 pm  
26
Van der Waals Radius
246.00 pm  
8
200.00 pm  
28
Atomic Weight
266.00 amu  
12
247.00 amu  
18
Atomic Volume
Not Available  
18.28 cm3/mol  
26
Adjacent Atomic Numbers
  
  
Previous Element
Nobelium
  
Americium
  
Next Element
Rutherfordium
  
Berkelium
  
Valence Electron Potential
Not Available  
44.50 (-eV)  
38
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  
13.51 g/cm3  
25
Density When Liquid (at m.p.)
Not Available  
13.85 g/cm3  
10
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
  
  
Specific Gravity
Not Available  
13.51  
17
Magnetic Ordering
Unknown  
Antiferromagnetic  
Electrical Properties
  
  
Resistivity
Not Available  
1.25 nΩ·m  
99+
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
  
  
Enthalpy of Fusion
Not Available  
15.00 kJ/mol  
21
Standard Molar Entropy
Not Available  
Not Available  
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