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Curium vs Rutherfordium

Curium
Rutherfordium
Rutherfordium vs Curium


Periodic Table
Symbol
Cm   
Rf   
Group Number
Not Available   
4   
14
Period Number
7   
7   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440519   
36
53850365   
13
Space Group Name
Not Available   
Not Available   
Space Group Number
Not Available   
Not Available   
Facts
Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
  • Rutherfordium does not occur in nature as it is a synthetic element.
  • Till date Rutherfordium metal has 15 radioisotopes created synthetically.
  
Sources
Bombarding Plutonium with Helium Ions   
Bombarding Plutonium with Accelerated 113 to 115 MeV Neon Ions, Synthetically Produced   
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso   
Joint Institute for Nuclear Research   
Discovery
In 1944   
In 1964   
Abundance
  
  
Uses
Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  
  • Currently known uses of Rutherfordium metal are limited to research purpose only.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
Research Purposes   
Alloys, 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
1,340.00 °C   
34
2,100.00 °C   
11
Boiling Point
3,110.00 °C   
30
5,500.00 °C   
3
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Unknown   
Luster
Metallic   
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
Cm   
Rf   
Isotopes
  
  
Known Isotopes
15   
24
13   
26
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
Not Available   
Allred Rochow Electronegativity
1.20   
27
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
Not Available   
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol   
99+
579.90 kJ/mol   
99+
2nd Energy Level
1,196.00 kJ/mol   
99+
1,389.40 kJ/mol   
99+
3rd Energy Level
2,026.00 kJ/mol   
99+
2,296.40 kJ/mol   
99+
4th Energy Level
3,550.00 kJ/mol   
99+
3,077.90 kJ/mol   
99+
Electrochemical Equivalent
3.07 g/amp-hr   
16
Not Available   
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
96   
22
104   
14
Electron Configuration
[Rn] 5f7 6d1 7s2   
[Rn] 5f14 6d2 7s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
96   
22
104   
14
Number of Neutrons
151   
10
157   
7
Number of Electrons
96   
22
104   
14
Radius of an Atom
  
  
Atomic Radius
174.00 pm   
20
150.00 pm   
33
Covalent Radius
169.00 pm   
26
157.00 pm   
31
Van der Waals Radius
200.00 pm   
28
Not Available   
Atomic Weight
247.00 amu   
18
267.00 amu   
11
Atomic Volume
18.28 cm3/mol   
26
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Americium
  
Lawrencium
  
Next Element
Berkelium
  
Dubnium
  
Valence Electron Potential
44.50 (-eV)   
38
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
13.51 g/cm3   
25
23.20 g/cm3   
8
Density When Liquid (at m.p.)
13.85 g/cm3   
10
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
Unknown   
Unknown   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
13.51   
17
Not Available   
Magnetic Ordering
Antiferromagnetic   
Unknown   
Electrical Properties
  
  
Resistivity
1.25 nΩ·m   
99+
Not Available   
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
15.00 kJ/mol   
21
Not Available   
Standard Molar Entropy
Not Available   
Not Available   
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