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Berkelium vs Rutherfordium


Rutherfordium vs Berkelium


Periodic Table

Symbol
Bk   
Rf   

Group Number
Not Available   
4   
14

Period Number
7   
7   

Block
f block   
d block   

Element Family
Actinide   
Transition Metal   

CAS Number
7440406   
99+
53850365   
13

Space Group Name
P63/mmc   
Not Available   

Space Group Number
194.00   
5
Not Available   

Facts

Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
  • Rutherfordium does not occur in nature as it is a synthetic element.
  • Till date Rutherfordium metal has 15 radioisotopes created synthetically.
  

Sources
Bombarding Americium with Alpha Particles.   
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 1949   
In 1964   

Abundance
  
  

Uses

Uses & Benefits
  • This metal is very rare and has no commercial uses.
  
  • 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
986.00 °C   
99+
2,100.00 °C   
11

Boiling Point
2,627.00 °C   
40
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
Bk   
Rf   

Isotopes
  
  

Known Isotopes
14   
25
13   
26

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
Not Available   

Allred Rochow Electronegativity
1.20   
27
Not Available   

Allen Electronegativity
2.70   
1
Not Available   

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
Not Available   

Ionization Energies
  
  

1st Energy Level
601.00 kJ/mol   
99+
579.90 kJ/mol   
99+

2nd Energy Level
1,186.00 kJ/mol   
99+
1,389.40 kJ/mol   
99+

3rd Energy Level
2,152.00 kJ/mol   
99+
2,296.40 kJ/mol   
99+

4th Energy Level
3,434.00 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, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity   

Atomic Properties

Atomic Number
97   
21
104   
14

Electron Configuration
[Rn] 5f9 7s2   
[Rn] 5f14 6d2 7s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
97   
21
104   
14

Number of Neutrons
150   
11
157   
7

Number of Electrons
97   
21
104   
14

Radius of an Atom
  
  

Atomic Radius
170.00 pm   
22
150.00 pm   
33

Covalent Radius
Not Available   
157.00 pm   
31

Atomic Weight
247.00 amu   
18
267.00 amu   
11

Atomic Volume
Not Available   
Not Available   

Adjacent Atomic Numbers
  
  

Previous Element
Curium
  
Lawrencium
  

Next Element
Dubnium
  

Valence Electron Potential
45.50 (-eV)   
36
Not Available   

Lattice Constant
341.60 pm   
99+
Not Available   

Lattice Angles
π/2, π/2, 2 π/3   
NA   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
14.78 g/cm3   
22
23.20 g/cm3   
8

Density When Liquid (at m.p.)
13.25 g/cm3   
11
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
NA   
Unknown   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
14.00   
14
Not Available   

Magnetic Ordering
Paramagnetic   
Unknown   

Electrical Properties
  
  

Electrical Property
Conductor   
Unknown   

Thermal Properties

Specific Heat
Not Available   
Not Available   

Molar Heat Capacity
Not Available   
Not Available   

Thermal Conductivity
10.00 W/m·K   
99+
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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