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What is Berkelium?
Berkelium


Periodic Table
Symbol
Bk
Group Number
14 4
Period Number
7 1
Block
f block
Element Family
Actinide
CAS Number
7440406 44
Space Group Name
P63/mmc
Space Group Number
194.00 7
Facts
Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
Sources
Bombarding Americium with Alpha Particles.
History
Who Discovered
Lawrence Berkeley National Laboratory
Discovery
In 1949
Abundance
Abundance In Universe
0.00 % 36
Abundance In Sun
0.00 % 30
Abundance In Meteorites
0.00 % 54
Abundance In Earth's Crust
0.00 % 60
Abundance In Oceans
-
Abundance In Humans
0.00 % 24
Uses
Uses & Benefits
  • This metal is very rare and has no commercial uses.
Industrial Uses
-
Medical Uses
-
Other Uses
-
Biological Properties
Toxicity
-
Present in Human Body
No
In Blood
0.00 Blood/mg dm-3 40
In Bone
0.00 p.p.m. 41
Physical
Melting Point
986.00 °C 46
Boiling Point
2,627.00 °C 42
Appearance
Physical State
Solid
Color
Silver
Luster
Metallic
Hardness
Mohs Hardness
6.00 6
Brinell Hardness
260.00 MPa 44
Vickers Hardness
1,070.00 MPa 16
Speed of Sound
2,560.00 m/s 50
Optical Properties
Refractive Index
1.30 43
Reflectivity
61.00 % 22
Allotropes
No
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
Bk
Isotopes
Known Isotopes
14 25
Electronegativity
Pauling Electronegativity
1.30 33
Sanderson Electronegativity
1.30 25
Allred Rochow Electronegativity
1.20 28
Mulliken-Jaffe Electronegativity
1.30 33
Allen Electronegativity
2.70 1
Electropositivity
Pauling Electropositivity
2.70 22
Ionization Energies
1st Energy Level
601.00 kJ/mol 52
2nd Energy Level
1,186.00 kJ/mol 63
3rd Energy Level
2,152.00 kJ/mol 69
4th Energy Level
3,434.00 kJ/mol 67
5th Energy Level
6,010.00 kJ/mol 45
6th Energy Level
6,010.00 kJ/mol 58
7th Energy level
6,010.00 kJ/mol 52
8th Energy Level
6,010.00 kJ/mol 50
9th Energy Level
6,010.00 kJ/mol 47
10th Energy Level
6,010.00 kJ/mol 49
11th Energy Level
6,010.00 kJ/mol 54
12th Energy Level
60,100.00 kJ/mol 16
13th Energy Level
6,010.00 kJ/mol 43
14th Energy Level
6,010.00 kJ/mol 32
15th Energy Level
60,100.00 kJ/mol 44
16th Energy Level
60,100.00 kJ/mol 33
17th Energy Level
601.00 kJ/mol 54
18th Energy Level
6,010.00 kJ/mol 46
19th Energy Level
601.00 kJ/mol 51
20th Energy Level
601.00 kJ/mol 48
21st Energy Level
6,010.00 kJ/mol 18
22nd Energy Level
601.00 kJ/mol 42
23rd Energy Level
6,010.00 kJ/mol 19
24th Energy Level
601.00 kJ/mol 44
25th Energy Level
601.00 kJ/mol 46
26th Energy Level
601.00 kJ/mol 46
27th Energy Level
601.00 kJ/mol 48
28th Energy Level
601.00 kJ/mol 52
29th Energy Level
601.00 kJ/mol 53
30th Energy Level
601.00 kJ/mol 49
Electrochemical Equivalent
3.07 g/amp-hr 19
Electron Work Function
4.90 eV 12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Atomic
Atomic Number
97 21
Electron Configuration
[Rn] 5f9 7s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100
Atom
Number of Protons
97 21
Number of Neutrons
150 12
Number of Electrons
97 21
Radius of an Atom
Atomic Radius
170.00 pm 24
Covalent Radius
170.00 pm 27
Van der Waals Radius
244.00 pm 14
Atomic Weight
247.00 amu 18
Atomic Volume
13.39 cm3/mol 56
Adjacent Atomic Numbers
Previous Element
83
Next Element
51
Valence Electron Potential
45.50 (-eV) 37
Lattice Constant
341.60 pm 51
Lattice Angles
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.57 38
Mechanical
Density
Density At Room Temperature
14.78 g/cm3 23
Density When Liquid (at m.p.)
13.25 g/cm3 29
Tensile Strength
70.00 MPa 31
Viscosity
0.00 25
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa) 22
Vapor Pressure at 2000 K
0.00 (Pa) 30
Elasticity properties
Shear Modulus
27.00 GPa 34
Bulk Modulus
13.00 GPa 57
Young's Modulus
13.00 GPa 56
Poisson Ratio
0.35 9
Other Mechanical Properties
-
Magnetic
Magnetic Characteristics
Specific Gravity
14.00 25
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m 13
Susceptibility
0.00 24
Electrical Properties
Electrical Property
Conductor
Resistivity
7.60 nΩ·m 56
Electrical Conductivity
0.10 106/cm Ω 25
Electron Affinity
0.00 kJ/mol 49
Thermal
Specific Heat
0.10 J/(kg K) 44
Molar Heat Capacity
27.00 J/mol·K 29
Thermal Conductivity
10.00 W/m·K 68
Critical Temperature
1,323.00 K 47
Thermal Expansion
13.25 µm/(m·K) 36
Enthalpy
Enthalpy of Vaporization
380.00 kJ/mol 27
Enthalpy of Fusion
13.25 kJ/mol 31
Enthalpy of Atomization
601.00 kJ/mol 11
Standard Molar Entropy
52.00 J/mol.K 37
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