Home
 Compare Metals

Praseodymium vs Americium

Praseodymium
Americium
Americium vs Praseodymium


Periodic Table
Symbol
Pr  
Am  
Group Number
3  
15
10  
8
Period Number
6  
7  
Block
f block  
f block  
Element Family
Lanthanide  
Actinide  
CAS Number
7440100  
99+
7440359  
99+
Space Group Name
P63/mmc  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Praseodymium metal is synthetically produced metal.
  • Praseodymium is used as possible fuel for radioactive generators.
  
  • Americium metal is produced by bombarding Plutonium with Neutrons.
  • Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Obtained By Bombarding Plutonium with Neutrons  
History
  
  
Who Discovered
-  
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso  
Discovery
In 1885  
In 1944  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
35
Abundance In Sun
0.00 %  
26
0.00 %  
30
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
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
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.
  
  • Americium metal is used in smoke detection alarms.
  • In the future, this metal has a potential to be used in batteries of spacecrafts.
  
Industrial Uses
Chemical Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Moderately Toxic  
Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
33
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
935.00 °C  
99+
994.00 °C  
99+
Boiling Point
3,130.00 °C  
28
2,607.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Grayish White  
Silvery White  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
4.00  
11
6.00  
6
Brinell Hardness
481.00 MPa  
29
260.00 MPa  
99+
Vickers Hardness
400.00 MPa  
99+
600.00 MPa  
28
Speed of Sound
2,280.00 m/s  
99+
2,750.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.64  
30
1.30  
99+
Reflectivity
60.00 %  
23
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pr  
Am  
Isotopes
  
  
Known Isotopes
31  
8
16  
23
Electronegativity
  
  
Pauling Electronegativity
1.13  
99+
1.30  
33
Sanderson Electronegativity
1.13  
36
1.30  
25
Allred Rochow Electronegativity
1.07  
33
1.20  
28
Mulliken-Jaffe Electronegativity
1.13  
99+
1.30  
33
Allen Electronegativity
1.13  
99+
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.87  
12
2.70  
22
Ionization Energies
  
  
1st Energy Level
527.00 kJ/mol  
99+
578.00 kJ/mol  
99+
2nd Energy Level
1,020.00 kJ/mol  
99+
1,158.00 kJ/mol  
99+
3rd Energy Level
2,086.00 kJ/mol  
99+
2,132.00 kJ/mol  
99+
4th Energy Level
3,761.00 kJ/mol  
99+
3,493.00 kJ/mol  
99+
5th Energy Level
5,551.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
6th Energy Level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
7th Energy level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
8th Energy Level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
9th Energy Level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
10th Energy Level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
11th Energy Level
5,274.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
12th Energy Level
5,270.00 kJ/mol  
99+
62,400.00 kJ/mol  
11
13th Energy Level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
14th Energy Level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
15th Energy Level
52,700.00 kJ/mol  
99+
62,400.00 kJ/mol  
39
16th Energy Level
52,700.00 kJ/mol  
99+
57,800.00 kJ/mol  
99+
17th Energy Level
527.30 kJ/mol  
99+
578.00 kJ/mol  
99+
18th Energy Level
5,270.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
19th Energy Level
527.30 kJ/mol  
99+
578.00 kJ/mol  
99+
20th Energy Level
527.00 kJ/mol  
99+
578.00 kJ/mol  
99+
21st Energy Level
527.00 kJ/mol  
99+
5,780.00 kJ/mol  
22
22nd Energy Level
527.00 kJ/mol  
99+
578.00 kJ/mol  
99+
23rd Energy Level
527.00 kJ/mol  
99+
5,780.00 kJ/mol  
23
24th Energy Level
527.40 kJ/mol  
99+
578.00 kJ/mol  
99+
25th Energy Level
527.00 kJ/mol  
99+
578.00 kJ/mol  
99+
26th Energy Level
527.40 kJ/mol  
99+
578.00 kJ/mol  
99+
27th Energy Level
527.40 kJ/mol  
99+
578.00 kJ/mol  
99+
28th Energy Level
527.40 kJ/mol  
99+
578.00 kJ/mol  
99+
29th Energy Level
527.00 kJ/mol  
99+
578.00 kJ/mol  
99+
30th Energy Level
527.00 kJ/mol  
99+
578.00 kJ/mol  
99+
Electrochemical Equivalent
1.75 g/amp-hr  
99+
3.02 g/amp-hr  
20
Electron Work Function
2.70 eV  
99+
4.30 eV  
25
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
59  
99+
95  
23
Electron Configuration
[Xe] 4f3 6s2  
[Rn] 5f7 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100  
DHCP-Crystal-Structure-of-Americium.jpg#100  
Atom
  
  
Number of Protons
59  
99+
95  
23
Number of Neutrons
82  
99+
148  
13
Number of Electrons
59  
99+
95  
23
Radius of an Atom
  
  
Atomic Radius
182.00 pm  
13
173.00 pm  
23
Covalent Radius
203.00 pm  
9
180.00 pm  
23
Van der Waals Radius
239.00 pm  
18
244.00 pm  
14
Atomic Weight
140.91 amu  
99+
243.00 amu  
20
Atomic Volume
20.80 cm3/mol  
25
17.86 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Cerium
  
Plutonium
  
Next Element
Neodymium
  
Curium
  
Valence Electron Potential
42.64 (-eV)  
99+
44.00 (-eV)  
99+
Lattice Constant
367.25 pm  
32
346.81 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.61  
18
1.58  
34
Mechanical
Density
  
  
Density At Room Temperature
6.77 g/cm3  
99+
12.00 g/cm3  
32
Density When Liquid (at m.p.)
6.50 g/cm3  
99+
13.67 g/cm3  
26
Tensile Strength
55.00 MPa  
37
80.00 MPa  
29
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
27
0.00 (Pa)  
13
Vapor Pressure at 2000 K
13.20 (Pa)  
7
0.00 (Pa)  
24
Elasticity properties
  
  
Shear Modulus
14.80 GPa  
99+
26.00 GPa  
36
Bulk Modulus
28.80 GPa  
99+
44.00 GPa  
32
Young's Modulus
37.30 GPa  
99+
58.00 GPa  
36
Poisson Ratio
0.28  
16
0.30  
14
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
6.77  
99+
13.67  
26
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
12
0.00 H/m  
16
Susceptibility
0.00  
19
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
0.70 nΩ·m  
99+
0.69 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
0.02 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
63.90 kJ/mol  
18
Thermal
Specific Heat
0.19 J/(kg K)  
33
0.11 J/(kg K)  
99+
Molar Heat Capacity
27.20 J/mol·K  
24
62.70 J/mol·K  
1
Thermal Conductivity
12.50 W/m·K  
99+
10.00 W/m·K  
99+
Critical Temperature
1,208.00 K  
99+
1,449.00 K  
99+
Thermal Expansion
6.70 µm/(m·K)  
99+
13.60 µm/(m·K)  
32
Enthalpy
  
  
Enthalpy of Vaporization
296.80 kJ/mol  
99+
161.00 kJ/mol  
99+
Enthalpy of Fusion
6.89 kJ/mol  
99+
14.39 kJ/mol  
27
Enthalpy of Atomization
368.00 kJ/mol  
33
268.00 kJ/mol  
99+
Standard Molar Entropy
73.20 J/mol.K  
10
63.10 J/mol.K  
23
Periodic Table >>
<< All

Compare Lanthanide Series

Lanthanide Series

Lanthanide Series

» More Lanthanide Series

Compare Lanthanide Series

» More Compare Lanthanide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!