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Plutonium vs Holmium

Plutonium
Holmium
Holmium vs Plutonium


Periodic Table
Symbol
Pu  
Ho  
Group Number
0  
18
3  
15
Period Number
7  
6  
Block
f block  
f block  
Element Family
Actinide  
Lanthanide  
CAS Number
7440075  
99+
7440600  
29
Space Group Name
P121/m1  
P63/mmc  
Space Group Number
11.00  
16
194.00  
7
Facts
Interesting Facts
  • Plutonium metal if obtain from ores of uranium metal.
  • Plutonium metal is very sensitive to the change in atmospheric conditions like temperature and pressure.
  
  • Holmium metal is very soft and malleable.
  • Holmium metal is well known for its corrosion resistivity.
  
Sources
Mining, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan  
Marc Delafontaine  
Discovery
In Between 1940 1941  
In 1878  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
28
Abundance In Sun
0.00 %  
21
-  
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
38
Abundance In Oceans
-  
0.00 %  
99+
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Plutonium was used in atomic bombs and still it is being used in various weapons and Ammunition industry.
  • It is also used in nuclear power plant as source of energy for space missions.
  
  • Holmium metal has an ability to absorb neutrons, so this metal is used in nuclear reactors to keep the chain reactions of elements under control.
  • Alloys of Holmium are used to produce Magnet.
  
Industrial Uses
Aerospace Industry, Ammunition Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys, Nuclear Research  
Biological Properties
  
  
Toxicity
Toxic  
Low Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
639.50 °C  
99+
1,461.00 °C  
30
Boiling Point
3,235.00 °C  
25
2,600.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
4.00  
11
4.00  
11
Brinell Hardness
627.00 MPa  
22
746.00 MPa  
14
Vickers Hardness
617.00 MPa  
26
481.00 MPa  
36
Speed of Sound
2,260.00 m/s  
99+
2,760.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.90  
18
1.67  
29
Reflectivity
68.00 %  
15
67.00 %  
16
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Pu  
Ho  
Isotopes
  
  
Known Isotopes
20  
19
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.28  
34
1.23  
38
Sanderson Electronegativity
1.28  
26
1.23  
30
Allred Rochow Electronegativity
1.22  
27
1.10  
31
Mulliken-Jaffe Electronegativity
1.30  
33
1.23  
37
Allen Electronegativity
1.28  
99+
1.23  
99+
Electropositivity
  
  
Pauling Electropositivity
2.72  
21
2.77  
17
Ionization Energies
  
  
1st Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
2nd Energy Level
1,128.00 kJ/mol  
99+
1,140.00 kJ/mol  
99+
3rd Energy Level
2,084.00 kJ/mol  
99+
2,204.00 kJ/mol  
99+
4th Energy Level
3,338.00 kJ/mol  
99+
4,100.00 kJ/mol  
99+
5th Energy Level
5,847.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
6th Energy Level
5,847.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
7th Energy level
5,840.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
8th Energy Level
5,840.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
9th Energy Level
5,840.00 kJ/mol  
99+
6,500.00 kJ/mol  
39
10th Energy Level
5,840.00 kJ/mol  
99+
6,500.00 kJ/mol  
99+
11th Energy Level
5,840.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
12th Energy Level
58,400.00 kJ/mol  
18
5,810.00 kJ/mol  
99+
13th Energy Level
5,840.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
14th Energy Level
5,840.00 kJ/mol  
39
5,810.00 kJ/mol  
40
15th Energy Level
58,400.00 kJ/mol  
99+
58,100.00 kJ/mol  
99+
16th Energy Level
58,400.00 kJ/mol  
40
581.00 kJ/mol  
99+
17th Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
18th Energy Level
5,840.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
19th Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
20th Energy Level
584.00 kJ/mol  
99+
581.00 kJ/mol  
99+
21st Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
22nd Energy Level
584.00 kJ/mol  
99+
581.00 kJ/mol  
99+
23rd Energy Level
584.70 kJ/mol  
99+
5,810.00 kJ/mol  
20
24th Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
25th Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
26th Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
27th Energy Level
584.70 kJ/mol  
99+
584.70 kJ/mol  
99+
28th Energy Level
584.70 kJ/mol  
99+
581.00 kJ/mol  
99+
29th Energy Level
584.70 kJ/mol  
99+
584.70 kJ/mol  
99+
30th Energy Level
584.00 kJ/mol  
99+
581.00 kJ/mol  
99+
Electrochemical Equivalent
2.28 g/amp-hr  
26
2.02 g/amp-hr  
33
Electron Work Function
3.88 eV  
38
4.90 eV  
12
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
94  
24
67  
99+
Electron Configuration
[Rn] 5f6 7s2  
[Xe] 4f11 6s2  
Crystal Structure
Monoclinic (MON)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
MON-Crystal-Structure-of-Plutonium.jpg#100  
HCP-Crystal-Structure-of-Holmium.jpg#100  
Atom
  
  
Number of Protons
94  
24
67  
99+
Number of Neutrons
150  
12
98  
35
Number of Electrons
94  
24
67  
99+
Radius of an Atom
  
  
Atomic Radius
159.00 pm  
30
176.00 pm  
20
Covalent Radius
187.00 pm  
20
192.00 pm  
17
Van der Waals Radius
200.00 pm  
35
216.00 pm  
30
Atomic Weight
244.00 amu  
19
164.93 amu  
99+
Atomic Volume
12.32 cm3/mol  
99+
18.70 cm3/mol  
36
Adjacent Atomic Numbers
  
  
Previous Element
Neptunium
  
Dysprosium
  
Next Element
Americium
  
Erbium
  
Valence Electron Potential
64.90 (-eV)  
21
47.90 (-eV)  
32
Lattice Constant
618.30 pm  
4
357.73 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.74  
6
1.57  
40
Mechanical
Density
  
  
Density At Room Temperature
19.82 g/cm3  
13
8.79 g/cm3  
99+
Density When Liquid (at m.p.)
16.63 g/cm3  
18
8.34 g/cm3  
99+
Tensile Strength
40.00 MPa  
99+
270.00 MPa  
17
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
28
0.00 (Pa)  
17
Vapor Pressure at 2000 K
2.20 (Pa)  
12
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
43.00 GPa  
18
26.30 GPa  
35
Bulk Modulus
100.00 GPa  
16
40.20 GPa  
37
Young's Modulus
96.00 GPa  
23
64.80 GPa  
33
Poisson Ratio
0.21  
33
0.23  
29
Other Mechanical Properties
Ductile, Malleable  
Ductile, Malleable, Sectile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
19.84  
16
8.80  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
7
Susceptibility
0.00  
21
0.00  
11
Electrical Properties
  
  
Electrical Property
Poor Conductor  
Conductor  
Resistivity
1.46 nΩ·m  
99+
814.00 nΩ·m  
4
Electrical Conductivity
0.01 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
0.60 kJ/mol  
99+
50.00 kJ/mol  
26
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.16 J/(kg K)  
36
Molar Heat Capacity
35.50 J/mol·K  
4
27.15 J/mol·K  
25
Thermal Conductivity
6.74 W/m·K  
99+
16.20 W/m·K  
99+
Critical Temperature
913.00 K  
99+
1,747.00 K  
34
Thermal Expansion
46.70 µm/(m·K)  
6
11.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
344.00 kJ/mol  
36
241.00 kJ/mol  
99+
Enthalpy of Fusion
2.82 kJ/mol  
99+
11.76 kJ/mol  
35
Enthalpy of Atomization
360.00 kJ/mol  
35
301.00 kJ/mol  
99+
Standard Molar Entropy
37.10 J/mol.K  
99+
75.30 J/mol.K  
8
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