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Radium vs Berkelium

Radium
Berkelium
Berkelium vs Radium


Periodic Table
Symbol
Ra  
Bk  
Group Number
2  
16
Not Available  
Period Number
7  
7  
Block
s block  
f block  
Element Family
Alkaline Earth  
Actinide  
CAS Number
7440144  
99+
7440406  
99+
Space Group Name
Im_ 3m  
P63/mmc  
Space Group Number
229.00  
1
194.00  
5
Facts
Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
Sources
Mining, Ores of metals  
Bombarding Americium with Alpha Particles.  
History
  
  
Who Discovered
Not Available  
Lawrence Berkeley National Laboratory  
Discovery
In 1898  
In 1949  
Abundance
  
  
Abundance In Earth's Crust
0.00 %  
99+
Not Available  
Abundance In Oceans
0.00 %  
99+
Not Available  
Abundance In Humans
0.00 %  
20
Not Available  
Uses
Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
  • This metal is very rare and has no commercial uses.
  
Industrial Uses
NA  
NA  
Medical Uses
Pharmaceutical Industry  
NA  
Other Uses
NA  
NA  
Biological Properties
  
  
Toxicity
Highly Toxic  
Unknown  
Present in Human Body
No  
No  
In Blood
Not Available  
0.00 Blood/mg dm-3  
37
In Bone
Not Available  
0.00 p.p.m.  
36
Physical Properties
Melting Point
700.00 °C  
99+
986.00 °C  
99+
Boiling Point
1,737.00 °C  
99+
2,627.00 °C  
40
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silver  
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
Ra  
Bk  
Isotopes
  
  
Known Isotopes
33  
6
14  
25
Electronegativity
  
  
Pauling Electronegativity
0.90  
99+
1.30  
32
Allred Rochow Electronegativity
0.97  
38
1.20  
27
Mulliken-Jaffe Electronegativity
0.92  
20
Not Available  
Allen Electronegativity
0.89  
99+
2.70  
1
Electropositivity
  
  
Pauling Electropositivity
3.10  
5
2.70  
22
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol  
99+
601.00 kJ/mol  
99+
2nd Energy Level
979.00 kJ/mol  
99+
1,186.00 kJ/mol  
99+
3rd Energy Level
Not Available  
2,152.00 kJ/mol  
99+
4th Energy Level
Not Available  
3,434.00 kJ/mol  
99+
Electrochemical Equivalent
4.22 g/amp-hr  
6
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
88  
30
97  
21
Electron Configuration
[Rn] 7s2  
[Rn] 5f9 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
DHCP-Crystal-Structure-of-Berkelium.jpg#100  
Atom
  
  
Number of Protons
88  
30
97  
21
Number of Neutrons
138  
16
150  
11
Number of Electrons
88  
30
97  
21
Radius of an Atom
  
  
Atomic Radius
Not Available  
170.00 pm  
22
Covalent Radius
221.00 pm  
3
Not Available  
Van der Waals Radius
283.00 pm  
4
Not Available  
Atomic Weight
226.00 amu  
26
247.00 amu  
18
Atomic Volume
45.20 cm3/mol  
4
Not Available  
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Curium
  
Next Element
Actinium
  
Californium
  
Valence Electron Potential
20.10 (-eV)  
99+
45.50 (-eV)  
36
Lattice Constant
514.80 pm  
13
341.60 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
5.50 g/cm3  
99+
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
NA  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.00  
99+
14.00  
14
Magnetic Ordering
Nonmagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
NA  
Conductor  
Resistivity
100.00 nΩ·m  
31
Not Available  
Thermal Properties
Specific Heat
0.12 J/(kg K)  
40
Not Available  
Molar Heat Capacity
Not Available  
Not Available  
Thermal Conductivity
18.60 W/m·K  
99+
10.00 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
Not Available  
Not Available  
Enthalpy
  
  
Enthalpy of Atomization
163.00 kJ/mol  
99+
Not Available  
Standard Molar Entropy
71.00 J/mol.K  
14
Not Available  
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