Symbol
Bk
  
Mc
  
Group Number
Not Available
  
Period Number
7
  
7
  
Block
f block
  
p block
  
Element Family
Actinide
  
Probably Post-Transition
  
Space Group Name
P63/mmc
  
Not Available
  
Space Group Number
Not Available
  
Interesting Facts
- X-ray Diffraction- different compounds of Berkelium metals are identified using it.
Commercial uses of Berkelium metal are not yet discovered.
  
Not Available
  
Sources
Bombarding Americium with Alpha Particles.
  
Synthetically Produced
  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory
  
Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory
  
Discovery
In 1949
  
In 2003
  
Abundance
  
  
Uses & Benefits
- This metal is very rare and has no commercial uses.
  
- Currently known uses of Ununpentium metal are limited to research purpose only.
  
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
Not Available
  
In Bone
0.00 p.p.m.
  
36
Not Available
  
Boiling Point
2,627.00 °C
  
40
1,100.00 °C
  
99+
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 Formula
Bk
  
Mc
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Not Available
  
Allred Rochow Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
601.00 kJ/mol
  
99+
538.40 kJ/mol
  
99+
2nd Energy Level
1,186.00 kJ/mol
  
99+
1,756.00 kJ/mol
  
24
3rd Energy Level
2,152.00 kJ/mol
  
99+
2,653.30 kJ/mol
  
40
4th Energy Level
3,434.00 kJ/mol
  
99+
4,679.50 kJ/mol
  
24
5th Energy Level
Not Available
  
5,721.60 kJ/mol
  
27
Electrochemical Equivalent
3.07 g/amp-hr
  
16
Not Available
  
Electron Work Function
Not Available
  
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
  
Chemical Stability, Ionization
  
Electron Configuration
[Rn] 5f9 7s2
  
[Rn] 5f14 6d10 7s2 7p3
  
Crystal Structure
Double Hexagonal Close Packed (DHCP)
  
Not Known
  
Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100
  
Unknown-Crystal-Structure-of-Ununpentium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Radius
Not Available
  
Atomic Volume
Not Available
  
Not Available
  
Adjacent Atomic Numbers
  
  
Valence Electron Potential
45.50 (-eV)
  
36
Not Available
  
Lattice Constant
Not Available
  
Lattice Angles
π/2, π/2, 2 π/3
  
NA
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
14.78 g/cm3
  
22
4.51 g/cm3
  
99+
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 Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Paramagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Unknown
  
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