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Nobelium vs Berkelium

Nobelium
Berkelium
Berkelium vs Nobelium


Periodic Table
Symbol
No  
Bk  
Group Number
Not Available  
Not Available  
Period Number
7  
7  
Block
f block  
f block  
Element Family
Actinide  
Actinide  
CAS Number
10028145  
16
7440406  
99+
Space Group Name
Not Available  
P63/mmc  
Space Group Number
Not Available  
194.00  
5
Facts
Interesting Facts
  • The most stable isotope of Nobelium metal is No-259.
  • No-259 has a half-life of fifty-eight minutes.
  
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
Sources
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining  
Bombarding Americium with Alpha Particles.  
History
  
  
Who Discovered
Joint Institute for Nuclear Research  
Lawrence Berkeley National Laboratory  
Discovery
In 1966  
In 1949  
Abundance
  
  
Uses
Uses & Benefits
  • Currently known uses of Nobelium metal are limited to research purpose only.
  
  • This metal is very rare and has no commercial uses.
  
Industrial Uses
NA  
NA  
Medical Uses
NA  
NA  
Other Uses
Research Purposes  
NA  
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
827.00 °C  
99+
986.00 °C  
99+
Boiling Point
Not Available  
2,627.00 °C  
40
Appearance
  
  
Physical State
Solid  
Solid  
Color
Unknown  
Silver  
Luster
Unknown Luster  
Metallic  
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
No  
Bk  
Isotopes
  
  
Known Isotopes
13  
26
14  
25
Electronegativity
  
  
Pauling Electronegativity
1.30  
32
1.30  
32
Allred Rochow Electronegativity
1.20  
27
1.20  
27
Allen Electronegativity
Not Available  
2.70  
1
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
2.70  
22
Ionization Energies
  
  
1st Energy Level
642.00 kJ/mol  
99+
601.00 kJ/mol  
99+
2nd Energy Level
1,254.00 kJ/mol  
99+
1,186.00 kJ/mol  
99+
3rd Energy Level
2,643.00 kJ/mol  
99+
2,152.00 kJ/mol  
99+
4th Energy Level
3,956.00 kJ/mol  
39
3,434.00 kJ/mol  
99+
Electrochemical Equivalent
4.83 g/amp-hr  
4
3.07 g/amp-hr  
16
Electron Work Function
Not Available  
Not Available  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
102  
16
97  
21
Electron Configuration
[Rn] 5f14 7s2  
[Rn] 5f9 7s2  
Crystal Structure
Not Known  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
Unknown-Crystal-Structure-of-Nobelium.jpg#100  
DHCP-Crystal-Structure-of-Berkelium.jpg#100  
Atom
  
  
Number of Protons
102  
16
97  
21
Number of Neutrons
157  
7
150  
11
Number of Electrons
102  
16
97  
21
Radius of an Atom
  
  
Atomic Radius
Not Available  
170.00 pm  
22
Van der Waals Radius
246.00 pm  
8
Not Available  
Atomic Weight
259.00 amu  
13
247.00 amu  
18
Atomic Volume
Not Available  
Not Available  
Adjacent Atomic Numbers
  
  
Previous Element
Mendelevium
  
Curium
  
Next Element
Lawrencium
  
Californium
  
Valence Electron Potential
26.00 (-eV)  
99+
45.50 (-eV)  
36
Lattice Constant
Not Available  
341.60 pm  
99+
Lattice Angles
NA  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
Not Available  
14.78 g/cm3  
22
Density When Liquid (at m.p.)
Not Available  
13.25 g/cm3  
11
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  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available  
14.00  
14
Magnetic Ordering
Unknown  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Unknown  
Conductor  
Thermal Properties
Specific Heat
Not Available  
Not Available  
Molar Heat Capacity
Not Available  
Not Available  
Thermal Conductivity
Not Available  
10.00 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
Not Available  
Not Available  
Enthalpy
  
  
Standard Molar Entropy
Not Available  
Not Available  
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