Home
 Compare Metals

Roentgenium vs Praseodymium

Roentgenium
Praseodymium
Praseodymium vs Roentgenium


Periodic Table
Symbol
Rg  
Pr  
Group Number
11  
7
3  
15
Period Number
7  
6  
Block
d block  
f block  
Element Family
-  
Lanthanide  
CAS Number
54386242  
1
7440100  
99+
Space Group Name
-  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
Roentgenium is a highly unstable synthetic element.  
  • Praseodymium metal is synthetically produced metal.
  • Praseodymium is used as possible fuel for radioactive generators.
  
Sources
Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
-  
Discovery
In 1994  
In 1885  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
23
Abundance In Sun
-  
0.00 %  
26
Abundance In Meteorites
-  
0.00 %  
40
Abundance In Earth's Crust
-  
0.00 %  
27
Abundance In Oceans
-  
0.00 %  
39
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Roentgenium 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
-  
Chemical Industry  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
-  
Moderately Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
33
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
935.00 °C  
99+
Boiling Point
2,800.00 °C  
38
3,130.00 °C  
28
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Grayish White  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
-  
4.00  
11
Brinell Hardness
700.00 MPa  
17
481.00 MPa  
29
Vickers Hardness
450.00 MPa  
38
400.00 MPa  
99+
Speed of Sound
3,430.00 m/s  
32
2,280.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.64  
30
Reflectivity
64.00 %  
19
60.00 %  
23
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rg  
Pr  
Isotopes
  
  
Known Isotopes
1  
34
31  
8
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
1.13  
99+
Sanderson Electronegativity
1.90  
13
1.13  
36
Allred Rochow Electronegativity
1.30  
25
1.07  
33
Mulliken-Jaffe Electronegativity
0.90  
99+
1.13  
99+
Allen Electronegativity
0.80  
99+
1.13  
99+
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.87  
12
Ionization Energies
  
  
1st Energy Level
1,022.70 kJ/mol  
3
527.00 kJ/mol  
99+
2nd Energy Level
2,074.40 kJ/mol  
10
1,020.00 kJ/mol  
99+
3rd Energy Level
3,077.90 kJ/mol  
24
2,086.00 kJ/mol  
99+
4th Energy Level
4,052.40 kJ/mol  
99+
3,761.00 kJ/mol  
99+
5th Energy Level
5,306.70 kJ/mol  
99+
5,551.00 kJ/mol  
99+
6th Energy Level
11,100.00 kJ/mol  
10
5,270.00 kJ/mol  
99+
7th Energy level
5,800.00 kJ/mol  
99+
5,270.00 kJ/mol  
99+
8th Energy Level
5,800.00 kJ/mol  
99+
5,270.00 kJ/mol  
99+
9th Energy Level
5,650.00 kJ/mol  
99+
5,270.00 kJ/mol  
99+
10th Energy Level
5,800.00 kJ/mol  
99+
5,270.00 kJ/mol  
99+
11th Energy Level
8,300.00 kJ/mol  
24
5,274.00 kJ/mol  
99+
12th Energy Level
8,300.00 kJ/mol  
99+
5,270.00 kJ/mol  
99+
13th Energy Level
8,700.00 kJ/mol  
16
5,270.00 kJ/mol  
99+
14th Energy Level
8,300.00 kJ/mol  
16
5,270.00 kJ/mol  
99+
15th Energy Level
87,000.00 kJ/mol  
9
52,700.00 kJ/mol  
99+
16th Energy Level
83,000.00 kJ/mol  
11
52,700.00 kJ/mol  
99+
17th Energy Level
830.80 kJ/mol  
30
527.30 kJ/mol  
99+
18th Energy Level
8,300.00 kJ/mol  
19
5,270.00 kJ/mol  
99+
19th Energy Level
580.00 kJ/mol  
99+
527.30 kJ/mol  
99+
20th Energy Level
580.00 kJ/mol  
99+
527.00 kJ/mol  
99+
21st Energy Level
5,800.00 kJ/mol  
21
527.00 kJ/mol  
99+
22nd Energy Level
580.00 kJ/mol  
99+
527.00 kJ/mol  
99+
23rd Energy Level
5,800.00 kJ/mol  
21
527.00 kJ/mol  
99+
24th Energy Level
538.70 kJ/mol  
99+
527.40 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
527.00 kJ/mol  
99+
26th Energy Level
580.00 kJ/mol  
99+
527.40 kJ/mol  
99+
27th Energy Level
580.00 kJ/mol  
99+
527.40 kJ/mol  
99+
28th Energy Level
880.00 kJ/mol  
8
527.40 kJ/mol  
99+
29th Energy Level
580.00 kJ/mol  
99+
527.00 kJ/mol  
99+
30th Energy Level
0.00 kJ/mol  
99+
527.00 kJ/mol  
99+
Electrochemical Equivalent
3.10 g/amp-hr  
18
1.75 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
2.70 eV  
99+
Other Chemical Properties
-  
Anti Corrosion, Ionization, Radioactive Isotopes  
Atomic
Atomic Number
111  
7
59  
99+
Electron Configuration
[Rn] 5f14 6d9 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
111  
7
59  
99+
Number of Neutrons
161  
4
82  
99+
Number of Electrons
111  
7
59  
99+
Radius of an Atom
  
  
Atomic Radius
200.00 pm  
7
182.00 pm  
13
Covalent Radius
126.00 pm  
99+
203.00 pm  
9
Van der Waals Radius
280.00 pm  
6
239.00 pm  
18
Atomic Weight
281.00 amu  
6
140.91 amu  
99+
Atomic Volume
28.70 cm3/mol  
12
20.80 cm3/mol  
25
Adjacent Atomic Numbers
  
  
Previous Element
Darmstadtium
  
Cerium
  
Next Element
Copernicium
  
Neodymium
  
Valence Electron Potential
11.90 (-eV)  
99+
42.64 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
367.25 pm  
32
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.90  
1
1.61  
18
Mechanical
Density
  
  
Density At Room Temperature
28.70 g/cm3  
6
6.77 g/cm3  
99+
Density When Liquid (at m.p.)
28.70 g/cm3  
7
6.50 g/cm3  
99+
Tensile Strength
65.00 MPa  
33
55.00 MPa  
37
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
27
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
13.20 (Pa)  
7
Elasticity properties
  
  
Shear Modulus
26.00 GPa  
36
14.80 GPa  
99+
Bulk Modulus
0.00 GPa  
99+
28.80 GPa  
99+
Young's Modulus
12.70 GPa  
99+
37.30 GPa  
99+
Poisson Ratio
0.30  
14
0.28  
16
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
28.70  
8
6.77  
99+
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
12
Susceptibility
0.00  
24
0.00  
19
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
0.20 nΩ·m  
99+
0.70 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
50.00 kJ/mol  
26
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.19 J/(kg K)  
33
Molar Heat Capacity
23.70 J/mol·K  
99+
27.20 J/mol·K  
24
Thermal Conductivity
0.10 W/m·K  
99+
12.50 W/m·K  
99+
Critical Temperature
1,100.00 K  
99+
1,208.00 K  
99+
Thermal Expansion
12.60 µm/(m·K)  
40
6.70 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
296.80 kJ/mol  
99+
Enthalpy of Fusion
-  
6.89 kJ/mol  
99+
Enthalpy of Atomization
580.00 kJ/mol  
14
368.00 kJ/mol  
33
Standard Molar Entropy
57.00 J/mol.K  
30
73.20 J/mol.K  
10
Periodic Table >>
<< All

Compare Synthetic Metals

Synthetic Metals

Synthetic Metals

Compare Synthetic Metals

Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!