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Praseodymium vs Gold

Praseodymium
Gold
Gold vs Praseodymium


Periodic Table
Symbol
Pr  
Au  
Group Number
3  
15
11  
7
Period Number
6  
6  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7440100  
99+
7440575  
31
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
7
225.00  
3
Facts
Interesting Facts
  • Praseodymium metal is synthetically produced metal.
  • Praseodymium is used as possible fuel for radioactive generators.
  
  • It is found in copper ores and from the crust of the earth.
  • It is the most malleable and ductile metal.
  • Gold alloys are used in Dentistry as fillings, crowning, clips, etc. It is also used as an artificial limb joints.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Earth's crust, Mining, Ores of metals  
History
  
  
Who Discovered
-  
-  
Discovery
In 1885  
Before 6000 BCE  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
27
Abundance In Sun
0.00 %  
26
0.00 %  
26
Abundance In Meteorites
0.00 %  
40
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
27
0.00 %  
99+
Abundance In Oceans
0.00 %  
39
0.00 %  
21
Abundance In Humans
0.00 %  
24
0.00 %  
21
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.
  
  • Gold metal is mainly used for Jewelry, bullion, coinage, etc.
  • It is used in the art, decoration, ornaments, etc. It is also used for electroplating process.
  
Industrial Uses
Chemical Industry  
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
Dentistry, Pharmaceutical Industry  
Other Uses
Alloys  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Moderately Toxic  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
33
0.00 Blood/mg dm-3  
38
In Bone
0.00 p.p.m.  
99+
0.02 p.p.m.  
35
Physical
Melting Point
935.00 °C  
99+
1,064.43 °C  
99+
Boiling Point
3,130.00 °C  
28
2,807.00 °C  
37
Appearance
  
  
Physical State
Solid  
Solid  
Color
Grayish White  
Gold  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
4.00  
11
2.50  
15
Brinell Hardness
481.00 MPa  
29
194.00 MPa  
99+
Vickers Hardness
400.00 MPa  
99+
216.00 MPa  
99+
Speed of Sound
2,280.00 m/s  
99+
2,030.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.64  
30
0.47  
99+
Reflectivity
60.00 %  
23
95.00 %  
2
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pr  
Au  
Isotopes
  
  
Known Isotopes
31  
8
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.13  
99+
2.54  
2
Sanderson Electronegativity
1.13  
36
1.50  
18
Allred Rochow Electronegativity
1.07  
33
1.42  
19
Mulliken-Jaffe Electronegativity
1.13  
99+
1.87  
15
Allen Electronegativity
1.13  
99+
1.92  
7
Electropositivity
  
  
Pauling Electropositivity
2.87  
12
1.46  
99+
Ionization Energies
  
  
1st Energy Level
527.00 kJ/mol  
99+
890.10 kJ/mol  
8
2nd Energy Level
1,020.00 kJ/mol  
99+
1,980.00 kJ/mol  
12
3rd Energy Level
2,086.00 kJ/mol  
99+
2,856.00 kJ/mol  
33
4th Energy Level
3,761.00 kJ/mol  
99+
890.10 kJ/mol  
99+
5th Energy Level
5,551.00 kJ/mol  
99+
8,901.00 kJ/mol  
6
6th Energy Level
5,270.00 kJ/mol  
99+
8,901.00 kJ/mol  
24
7th Energy level
5,270.00 kJ/mol  
99+
8,901.00 kJ/mol  
21
8th Energy Level
5,270.00 kJ/mol  
99+
8,900.00 kJ/mol  
20
9th Energy Level
5,270.00 kJ/mol  
99+
8,901.00 kJ/mol  
20
10th Energy Level
5,270.00 kJ/mol  
99+
8,901.00 kJ/mol  
21
11th Energy Level
5,274.00 kJ/mol  
99+
8,901.00 kJ/mol  
19
12th Energy Level
5,270.00 kJ/mol  
99+
8,900.00 kJ/mol  
39
13th Energy Level
5,270.00 kJ/mol  
99+
8,900.00 kJ/mol  
14
14th Energy Level
5,270.00 kJ/mol  
99+
890.10 kJ/mol  
99+
15th Energy Level
52,700.00 kJ/mol  
99+
89,000.00 kJ/mol  
7
16th Energy Level
52,700.00 kJ/mol  
99+
890.10 kJ/mol  
99+
17th Energy Level
527.30 kJ/mol  
99+
890.10 kJ/mol  
25
18th Energy Level
5,270.00 kJ/mol  
99+
8,901.00 kJ/mol  
14
19th Energy Level
527.30 kJ/mol  
99+
890.10 kJ/mol  
23
20th Energy Level
527.00 kJ/mol  
99+
890.00 kJ/mol  
13
21st Energy Level
527.00 kJ/mol  
99+
890.10 kJ/mol  
35
22nd Energy Level
527.00 kJ/mol  
99+
890.00 kJ/mol  
11
23rd Energy Level
527.00 kJ/mol  
99+
890.10 kJ/mol  
38
24th Energy Level
527.40 kJ/mol  
99+
890.10 kJ/mol  
6
25th Energy Level
527.00 kJ/mol  
99+
890.00 kJ/mol  
5
26th Energy Level
527.40 kJ/mol  
99+
890.10 kJ/mol  
5
27th Energy Level
527.40 kJ/mol  
99+
890.10 kJ/mol  
4
28th Energy Level
527.40 kJ/mol  
99+
890.10 kJ/mol  
7
29th Energy Level
527.00 kJ/mol  
99+
890.10 kJ/mol  
8
30th Energy Level
527.00 kJ/mol  
99+
890.10 kJ/mol  
5
Electrochemical Equivalent
1.75 g/amp-hr  
99+
2.45 g/amp-hr  
25
Electron Work Function
2.70 eV  
99+
5.10 eV  
8
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
59  
99+
79  
37
Electron Configuration
[Xe] 4f3 6s2  
[Xe] 4f14 5d10 6s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100  
FCC-Crystal-Structure-of-Gold.jpg#100  
Atom
  
  
Number of Protons
59  
99+
79  
37
Number of Neutrons
82  
99+
118  
24
Number of Electrons
59  
99+
79  
37
Radius of an Atom
  
  
Atomic Radius
182.00 pm  
13
151.00 pm  
34
Covalent Radius
203.00 pm  
9
144.00 pm  
99+
Van der Waals Radius
239.00 pm  
18
166.00 pm  
99+
Atomic Weight
140.91 amu  
99+
196.97 amu  
33
Atomic Volume
20.80 cm3/mol  
25
10.20 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Cerium
  
Platinum
  
Next Element
Neodymium
  
Mercury
  
Valence Electron Potential
42.64 (-eV)  
99+
43.40 (-eV)  
99+
Lattice Constant
367.25 pm  
32
407.82 pm  
24
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.61  
18
1.61  
18
Mechanical
Density
  
  
Density At Room Temperature
6.77 g/cm3  
99+
19.30 g/cm3  
15
Density When Liquid (at m.p.)
6.50 g/cm3  
99+
17.31 g/cm3  
16
Tensile Strength
55.00 MPa  
37
120.00 MPa  
27
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
27
0.00 (Pa)  
25
Vapor Pressure at 2000 K
13.20 (Pa)  
7
67.00 (Pa)  
4
Elasticity properties
  
  
Shear Modulus
14.80 GPa  
99+
27.00 GPa  
34
Bulk Modulus
28.80 GPa  
99+
180.00 GPa  
9
Young's Modulus
37.30 GPa  
99+
79.00 GPa  
26
Poisson Ratio
0.28  
16
0.40  
4
Other Mechanical Properties
Ductile, Malleable  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
6.77  
99+
19.32  
17
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
10
Susceptibility
0.00  
19
0.00  
22
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
0.70 nΩ·m  
99+
2.20 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
0.45 106/cm Ω  
3
Electron Affinity
50.00 kJ/mol  
26
222.80 kJ/mol  
1
Thermal
Specific Heat
0.19 J/(kg K)  
33
0.13 J/(kg K)  
40
Molar Heat Capacity
27.20 J/mol·K  
24
25.42 J/mol·K  
99+
Thermal Conductivity
12.50 W/m·K  
99+
318.00 W/m·K  
3
Critical Temperature
1,208.00 K  
99+
1,337.00 K  
99+
Thermal Expansion
6.70 µm/(m·K)  
99+
14.20 µm/(m·K)  
29
Enthalpy
  
  
Enthalpy of Vaporization
296.80 kJ/mol  
99+
324.40 kJ/mol  
99+
Enthalpy of Fusion
6.89 kJ/mol  
99+
12.55 kJ/mol  
33
Enthalpy of Atomization
368.00 kJ/mol  
33
364.00 kJ/mol  
34
Standard Molar Entropy
73.20 J/mol.K  
10
47.40 J/mol.K  
99+
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