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Fermium vs Rutherfordium

Fermium
Rutherfordium
Rutherfordium vs Fermium


Periodic Table
Symbol
Fm   
Rf   
Group Number
Not Available   
4   
14
Period Number
7   
7   
Block
f block   
d block   
Element Family
Actinide   
Transition Metal   
CAS Number
7440724   
19
53850365   
13
Space Group Name
Not Available   
Not Available   
Space Group Number
Not Available   
Not Available   
Facts
Interesting Facts
  • Fermium metal is highly radioactive in nature.
  • Fermium is 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 Pu-239 with Neutrons   
Bombarding Plutonium with Accelerated 113 to 115 MeV Neon Ions, Synthetically Produced   
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory   
Joint Institute for Nuclear Research   
Discovery
In 1952   
In 1964   
Abundance
  
  
Uses
Uses & Benefits
  • Currently known uses of Fermium metal are limited to research purpose only.
  
  • Currently known uses of Rutherfordium metal are limited to research purpose only.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
NA   
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
1,527.00 °C   
26
2,100.00 °C   
11
Boiling Point
Not Available   
5,500.00 °C   
3
Appearance
  
  
Physical State
Solid   
Solid   
Luster
Not Defined   
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
Fm   
Rf   
Isotopes
  
  
Known Isotopes
18   
21
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
627.00 kJ/mol   
99+
579.90 kJ/mol   
99+
2nd Energy Level
1,225.00 kJ/mol   
99+
1,389.40 kJ/mol   
99+
3rd Energy Level
2,363.00 kJ/mol   
99+
2,296.40 kJ/mol   
99+
4th Energy Level
3,792.00 kJ/mol   
99+
3,077.90 kJ/mol   
99+
Electrochemical Equivalent
3.20 g/amp-hr   
13
Not Available   
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
100   
18
104   
14
Electron Configuration
[Rn] 5f12 7s2   
[Rn] 5f14 6d2 7s2   
Crystal Structure
Not Known   
Hexagonal Close Packed (HCP)   
Crystal Lattice
Unknown-Crystal-Structure-of-Fermium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
100   
18
104   
14
Number of Neutrons
157   
7
157   
7
Number of Electrons
100   
18
104   
14
Radius of an Atom
  
  
Atomic Radius
Not Available   
150.00 pm   
33
Covalent Radius
Not Available   
157.00 pm   
31
Van der Waals Radius
245.00 pm   
9
Not Available   
Atomic Weight
257.00 amu   
15
267.00 amu   
11
Atomic Volume
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Einsteinium
  
Lawrencium
  
Next Element
Mendelevium
  
Dubnium
  
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   
23.20 g/cm3   
8
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
NA   
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   
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