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Praseodymium vs Tantalum

Praseodymium
Tantalum
Tantalum vs Praseodymium


Periodic Table
Symbol
Pr   
Ta   
Group Number
Not Available   
5   
13
Period Number
6   
6   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7440100   
99+
7440257   
99+
Space Group Name
P63/mmc   
Im_ 3m   
Space Group Number
194.00   
5
229.00   
1
Facts
Interesting Facts
  • Praseodymium metal is synthetically produced metal.
  • Praseodymium is used as possible fuel for radioactive generators.
  
  • Tantalum metal is known as corrosion resistance.
  • Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.
  
Sources
Found in Minerals, Mining, Ores of Minerals   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Not Available   
Anders Gustaf Ekeberg   
Discovery
In 1885   
In 1802   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
8 * 10-9 %   
31
Abundance In Sun
~0.0000001 %   
26
~-9999 %   
Abundance In Meteorites
0.00 %   
40
0.00 %   
99+
Abundance In Earth's Crust
0.00 %   
27
0.00 %   
37
Abundance In Oceans
0.00 %   
39
0.00 %   
31
Uses
Uses & Benefits
  • 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.
  
  • Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
  • Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.
  
Industrial Uses
Chemical Industry   
Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Moderately Toxic   
Low Toxic   
Present in Human Body
No   
Yes   
In Bone
Not Available   
0.03 p.p.m.   
28
Physical Properties
Melting Point
935.00 °C   
99+
2,996.00 °C   
4
Boiling Point
3,130.00 °C   
27
5,425.00 °C   
4
Appearance
  
  
Physical State
Solid   
Solid   
Color
Grayish White   
Gray Blue   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
6.50   
5
Brinell Hardness
481.00 MPa   
24
440.00 MPa   
28
Vickers Hardness
400.00 MPa   
25
870.00 MPa   
12
Speed of Sound
2,280.00 m/s   
40
3,400.00 m/s   
22
Optical Properties
  
  
Reflectivity
Not Available   
78.00 %   
6
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
Pr   
Ta   
Isotopes
  
  
Known Isotopes
31   
8
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.13   
99+
1.50   
27
Allred Rochow Electronegativity
1.07   
32
1.33   
22
Allen Electronegativity
Not Available   
1.34   
33
Electropositivity
  
  
Pauling Electropositivity
2.87   
12
2.50   
27
Ionization Energies
  
  
1st Energy Level
527.00 kJ/mol   
99+
761.00 kJ/mol   
18
2nd Energy Level
1,020.00 kJ/mol   
99+
1,500.00 kJ/mol   
40
3rd Energy Level
2,086.00 kJ/mol   
99+
Not Available   
4th Energy Level
3,761.00 kJ/mol   
99+
Not Available   
5th Energy Level
5,551.00 kJ/mol   
29
Not Available   
Electrochemical Equivalent
1.75 g/amp-hr   
40
1.35 g/amp-hr   
99+
Electron Work Function
2.70 eV   
99+
4.25 eV   
21
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes   
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
59   
99+
73   
99+
Electron Configuration
[Xe] 4f3 6s2   
[Xe] 4f14 5d3 6s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
59   
99+
73   
99+
Number of Neutrons
82   
99+
108   
28
Number of Electrons
59   
99+
73   
99+
Radius of an Atom
  
  
Atomic Radius
182.00 pm   
11
146.00 pm   
35
Covalent Radius
203.00 pm   
9
170.00 pm   
25
Van der Waals Radius
239.00 pm   
14
200.00 pm   
28
Atomic Weight
140.91 amu   
99+
180.95 amu   
38
Atomic Volume
20.80 cm3/mol   
15
10.90 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Cerium
  
Hafnium
  
Next Element
Neodymium
  
Tungsten
  
Valence Electron Potential
42.64 (-eV)   
99+
110.00 (-eV)   
7
Lattice Constant
367.25 pm   
29
330.13 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.61   
4
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
6.77 g/cm3   
99+
16.69 g/cm3   
18
Density When Liquid (at m.p.)
6.50 g/cm3   
39
15.00 g/cm3   
9
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
25
Not Available   
Vapor Pressure at 2000 K
13.20 (Pa)   
7
0.00 (Pa)   
31
Elasticity properties
  
  
Shear Modulus
14.80 GPa   
39
69.00 GPa   
13
Bulk Modulus
28.80 GPa   
40
200.00 GPa   
8
Young's Modulus
37.30 GPa   
99+
186.00 GPa   
13
Poisson Ratio
0.28   
16
0.34   
10
Other Mechanical Properties
Ductile, Malleable   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
6.77   
99+
16.65   
11
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
0.70 nΩ·m   
99+
131.00 nΩ·m   
25
Electrical Conductivity
0.01 106/cm Ω   
99+
0.08 106/cm Ω   
27
Electron Affinity
50.00 kJ/mol   
21
31.00 kJ/mol   
29
Thermal Properties
Specific Heat
0.19 J/(kg K)   
32
0.14 J/(kg K)   
37
Molar Heat Capacity
27.20 J/mol·K   
18
25.36 J/mol·K   
99+
Thermal Conductivity
12.50 W/m·K   
99+
57.50 W/m·K   
27
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
6.70 µm/(m·K)   
99+
6.30 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
296.80 kJ/mol   
29
753.10 kJ/mol   
2
Enthalpy of Fusion
6.89 kJ/mol   
99+
31.40 kJ/mol   
3
Enthalpy of Atomization
368.00 kJ/mol   
24
782.00 kJ/mol   
3
Standard Molar Entropy
73.20 J/mol.K   
10
41.50 J/mol.K   
37
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