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Radium Praseodymium Comparison

Radium
Praseodymium
Praseodymium Radium comparison


Periodic Table
Symbol
Ra   
Pr   
Group Number
2   
16
Not Available   
Period Number
7   
6   
Block
s block   
f block   
Element Family
Alkaline Earth   
Lanthanide   
CAS Number
7440144   
99+
7440100   
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.
  
  • Praseodymium metal is synthetically produced metal.
  • Praseodymium is used as possible fuel for radioactive generators.
  
Sources
Mining, Ores of metals   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Not Available   
Not Available   
Discovery
In 1898   
In 1885   
Abundance
  
  
Abundance In Universe
Not Available   
2 * 10-7 %   
22
Abundance In Sun
~-9999 %   
~0.0000001 %   
26
Abundance In Meteorites
Not Available   
0.00 %   
40
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
27
Abundance In Oceans
0.00 %   
99+
0.00 %   
39
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.
  
  • The main use of Praseodymium include alloys. Praseodymium –Magnesium alloy is used in aircraft engines due to its high strength.
  • This metal is also used while making a permanent magnets.
  
Industrial Uses
NA   
Chemical Industry   
Medical Uses
Pharmaceutical Industry   
NA   
Other Uses
NA   
Alloys   
Biological Properties
  
  
Toxicity
Highly Toxic   
Moderately Toxic   
Present in Human Body
No   
No   
Physical Properties
Melting Point
700.00 °C   
99+
935.00 °C   
99+
Boiling Point
1,737.00 °C   
99+
3,130.00 °C   
27
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Grayish White   
Luster
Metallic   
Metallic   
Hardness
  
  
Brinell Hardness
Not Available   
481.00 MPa   
24
Vickers Hardness
Not Available   
400.00 MPa   
25
Speed of Sound
Not Available   
2,280.00 m/s   
40
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   
Pr   
Isotopes
  
  
Known Isotopes
33   
6
31   
8
Electronegativity
  
  
Pauling Electronegativity
0.90   
99+
1.13   
99+
Allred Rochow Electronegativity
0.97   
38
1.07   
32
Mulliken-Jaffe Electronegativity
0.92   
20
Not Available   
Allen Electronegativity
0.89   
99+
Not Available   
Electropositivity
  
  
Pauling Electropositivity
3.10   
5
2.87   
12
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol   
99+
527.00 kJ/mol   
99+
2nd Energy Level
979.00 kJ/mol   
99+
1,020.00 kJ/mol   
99+
3rd Energy Level
Not Available   
2,086.00 kJ/mol   
99+
4th Energy Level
Not Available   
3,761.00 kJ/mol   
99+
5th Energy Level
Not Available   
5,551.00 kJ/mol   
29
Electrochemical Equivalent
4.22 g/amp-hr   
6
1.75 g/amp-hr   
40
Electron Work Function
Not Available   
2.70 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Anti Corrosion, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
88   
30
59   
99+
Electron Configuration
[Rn] 7s2   
[Xe] 4f3 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Praseodymium.jpg#100   
Atom
  
  
Number of Protons
88   
30
59   
99+
Number of Neutrons
138   
16
82   
99+
Number of Electrons
88   
30
59   
99+
Radius of an Atom
  
  
Atomic Radius
Not Available   
182.00 pm   
11
Covalent Radius
221.00 pm   
3
203.00 pm   
9
Van der Waals Radius
283.00 pm   
4
239.00 pm   
14
Atomic Weight
226.00 amu   
26
140.91 amu   
99+
Atomic Volume
45.20 cm3/mol   
4
20.80 cm3/mol   
15
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Cerium
  
Next Element
Actinium
  
Neodymium
  
Valence Electron Potential
20.10 (-eV)   
99+
42.64 (-eV)   
99+
Lattice Constant
514.80 pm   
13
367.25 pm   
29
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.61   
4
Mechanical Properties
Density
  
  
Density At Room Temperature
5.50 g/cm3   
99+
6.77 g/cm3   
99+
Density When Liquid (at m.p.)
Not Available   
6.50 g/cm3   
39
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
25
Vapor Pressure at 2000 K
Not Available   
13.20 (Pa)   
7
Elasticity properties
  
  
Shear Modulus
Not Available   
14.80 GPa   
39
Bulk Modulus
Not Available   
28.80 GPa   
40
Young's Modulus
Not Available   
37.30 GPa   
99+
Poisson Ratio
Not Available   
0.28   
16
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.00   
99+
6.77   
99+
Magnetic Ordering
Nonmagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
NA   
Conductor   
Resistivity
100.00 nΩ·m   
31
0.70 nΩ·m   
99+
Electrical Conductivity
Not Available   
0.01 106/cm Ω   
99+
Electron Affinity
Not Available   
50.00 kJ/mol   
21
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.19 J/(kg K)   
32
Molar Heat Capacity
Not Available   
27.20 J/mol·K   
18
Thermal Conductivity
18.60 W/m·K   
99+
12.50 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
6.70 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
296.80 kJ/mol   
29
Enthalpy of Fusion
Not Available   
6.89 kJ/mol   
99+
Enthalpy of Atomization
163.00 kJ/mol   
99+
368.00 kJ/mol   
24
Standard Molar Entropy
71.00 J/mol.K   
14
73.20 J/mol.K   
10
Summary >>
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