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Berkelium vs Radium

Berkelium
Radium
Radium vs Berkelium


Periodic Table
Symbol
Bk   
Ra   
Group Number
Not Available   
2   
16
Period Number
7   
7   
Block
f block   
s block   
Element Family
Actinide   
Alkaline Earth   
CAS Number
7440406   
99+
7440144   
99+
Space Group Name
P63/mmc   
Im_ 3m   
Space Group Number
194.00   
5
229.00   
1
Facts
Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Sources
Bombarding Americium with Alpha Particles.   
Mining, Ores of metals   
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory   
Not Available   
Discovery
In 1949   
In 1898   
Abundance
  
  
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
99+
Abundance In Humans
Not Available   
0.00 %   
20
Uses
Uses & Benefits
  • This metal is very rare and has no commercial uses.
  
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
Pharmaceutical Industry   
Other Uses
NA   
NA   
Biological Properties
  
  
Toxicity
Unknown   
Highly Toxic   
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   
Physical Properties
Melting Point
986.00 °C   
99+
700.00 °C   
99+
Boiling Point
2,627.00 °C   
40
1,737.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silvery White   
Luster
Metallic   
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
Bk   
Ra   
Isotopes
  
  
Known Isotopes
14   
25
33   
6
Electronegativity
  
  
Pauling Electronegativity
1.30   
32
0.90   
99+
Allred Rochow Electronegativity
1.20   
27
0.97   
38
Mulliken-Jaffe Electronegativity
Not Available   
0.92   
20
Allen Electronegativity
2.70   
1
0.89   
99+
Electropositivity
  
  
Pauling Electropositivity
2.70   
22
3.10   
5
Ionization Energies
  
  
1st Energy Level
601.00 kJ/mol   
99+
509.30 kJ/mol   
99+
2nd Energy Level
1,186.00 kJ/mol   
99+
979.00 kJ/mol   
99+
3rd Energy Level
2,152.00 kJ/mol   
99+
Not Available   
4th Energy Level
3,434.00 kJ/mol   
99+
Not Available   
Electrochemical Equivalent
3.07 g/amp-hr   
16
4.22 g/amp-hr   
6
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
97   
21
88   
30
Electron Configuration
[Rn] 5f9 7s2   
[Rn] 7s2   
Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
97   
21
88   
30
Number of Neutrons
150   
11
138   
16
Number of Electrons
97   
21
88   
30
Radius of an Atom
  
  
Atomic Radius
170.00 pm   
22
Not Available   
Covalent Radius
Not Available   
221.00 pm   
3
Van der Waals Radius
Not Available   
283.00 pm   
4
Atomic Weight
247.00 amu   
18
226.00 amu   
26
Atomic Volume
Not Available   
45.20 cm3/mol   
4
Adjacent Atomic Numbers
  
  
Previous Element
Curium
  
Francium
  
Next Element
Californium
  
Actinium
  
Valence Electron Potential
45.50 (-eV)   
36
20.10 (-eV)   
99+
Lattice Constant
341.60 pm   
99+
514.80 pm   
13
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
14.78 g/cm3   
22
5.50 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   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
14.00   
14
5.00   
99+
Magnetic Ordering
Paramagnetic   
Nonmagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
NA   
Resistivity
Not Available   
100.00 nΩ·m   
31
Thermal Properties
Specific Heat
Not Available   
0.12 J/(kg K)   
40
Molar Heat Capacity
Not Available   
Not Available   
Thermal Conductivity
10.00 W/m·K   
99+
18.60 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
Not Available   
Enthalpy
  
  
Enthalpy of Atomization
Not Available   
163.00 kJ/mol   
99+
Standard Molar Entropy
Not Available   
71.00 J/mol.K   
14
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