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Rutherfordium vs Praseodymium


Praseodymium vs Rutherfordium


Periodic Table

Symbol
Rf   
Pr   

Group Number
4   
14
Not Available   

Period Number
7   
6   

Block
d block   
f block   

Element Family
Transition Metal   
Lanthanide   

CAS Number
53850365   
13
7440100   
99+

Space Group Name
Not Available   
P63/mmc   

Space Group Number
Not Available   
194.00   
5

Facts

Interesting Facts
  • Rutherfordium does not occur in nature as it is a synthetic element.
  • Till date Rutherfordium metal has 15 radioisotopes created synthetically.
  
  • Praseodymium metal is synthetically produced metal.
  • Praseodymium is used as possible fuel for radioactive generators.
  

Sources
Bombarding Plutonium with Accelerated 113 to 115 MeV Neon Ions, Synthetically Produced   
Found in Minerals, Mining, Ores of Minerals   

History
  
  

Who Discovered
Joint Institute for Nuclear Research   
Not Available   

Discovery
In 1964   
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
Not Available   
0.00 %   
27

Abundance In Oceans
Not Available   
0.00 %   
39

Uses

Uses & Benefits
  • Currently known uses of Rutherfordium metal are limited to research purpose only.
  
  • 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
NA   
NA   

Other Uses
Alloys, Research Purposes   
Alloys   

Biological Properties
  
  

Toxicity
Unknown   
Moderately 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
2,100.00 °C   
11
935.00 °C   
99+

Boiling Point
5,500.00 °C   
3
3,130.00 °C   
27

Appearance
  
  

Physical State
Solid   
Solid   

Color
Unknown   
Grayish White   

Luster
Unknown Luster   
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
Rf   
Pr   

Isotopes
  
  

Known Isotopes
13   
26
31   
8

Electronegativity
  
  

Pauling Electronegativity
Not Available   
1.13   
99+

Allred Rochow Electronegativity
Not Available   
1.07   
32

Electropositivity
  
  

Pauling Electropositivity
Not Available   
2.87   
12

Ionization Energies
  
  

1st Energy Level
579.90 kJ/mol   
99+
527.00 kJ/mol   
99+

2nd Energy Level
1,389.40 kJ/mol   
99+
1,020.00 kJ/mol   
99+

3rd Energy Level
2,296.40 kJ/mol   
99+
2,086.00 kJ/mol   
99+

4th Energy Level
3,077.90 kJ/mol   
99+
3,761.00 kJ/mol   
99+

5th Energy Level
Not Available   
5,551.00 kJ/mol   
29

Electrochemical Equivalent
Not Available   
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
104   
14
59   
99+

Electron Configuration
[Rn] 5f14 6d2 7s2   
[Xe] 4f3 6s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Praseodymium.jpg#100   

Atom
  
  

Number of Protons
104   
14
59   
99+

Number of Neutrons
157   
7
82   
99+

Number of Electrons
104   
14
59   
99+

Radius of an Atom
  
  

Atomic Radius
150.00 pm   
33
182.00 pm   
11

Covalent Radius
157.00 pm   
31
203.00 pm   
9

Van der Waals Radius
Not Available   
239.00 pm   
14

Atomic Weight
267.00 amu   
11
140.91 amu   
99+

Atomic Volume
Not Available   
20.80 cm3/mol   
15

Adjacent Atomic Numbers
  
  

Previous Element
Lawrencium
  
Cerium
  

Next Element
Dubnium
  
Neodymium
  

Valence Electron Potential
Not Available   
42.64 (-eV)   
99+

Lattice Constant
Not Available   
367.25 pm   
29

Lattice Angles
NA   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
1.61   
4

Mechanical Properties

Density
  
  

Density At Room Temperature
23.20 g/cm3   
8
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
Unknown   
Ductile, Malleable   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
Not Available   
6.77   
99+

Magnetic Ordering
Unknown   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Unknown   
Conductor   

Resistivity
Not Available   
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
Not Available   
0.19 J/(kg K)   
32

Molar Heat Capacity
Not Available   
27.20 J/mol·K   
18

Thermal Conductivity
Not Available   
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
Not Available   
368.00 kJ/mol   
24

Standard Molar Entropy
Not Available   
73.20 J/mol.K   
10

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