Osmium vs Plutonium
Periodic Table
Symbol
Os
Pu
Group Number
8
10
0
18
Period Number
6
7
Block
d block
f block
Element Family
Transition Metal
Actinide
CAS Number
7440042
99+
7440075
99+
Space Group Name
P63/mmc
P121/m1
Space Group Number
194.00
5
11.00
13
Facts
Interesting Facts
- Osmium metal does not oxidize in air unless it is heated.
- But if it heated den it forms Osmium Tetroxide, which is highly toxic.
- Plutonium metal if obtain from ores of uranium metal.
- Plutonium metal is very sensitive to the change in atmospheric conditions like temperature and pressure.
Sources
Found As a By-product, Found in Minerals, Mining
Mining, Ores of metals
History
Who Discovered
Smithson Tennant
Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan
Discovery
In 1803
In Between 1940 1941
Abundance
Abundance In Universe
3 * 10-7 %
21
Not Available
Abundance In Sun
~0.0000002 %
25
~-9999 %
Abundance In Meteorites
0.00 %
28
Not Available
Abundance In Earth's Crust
0.00 %
99+
Not Available
Uses
Uses & Benefits
- Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
- It is also used as industrial catalyst to speed up the chemical reaction.
- 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.
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Aerospace Industry, Ammunition Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Highly Toxic
Toxic
Present in Human Body
No
No
In Blood
Not Available
0.00 Blood/mg dm-3
37
In Bone
Not Available
0.00 p.p.m.
36
Physical Properties
Melting Point
3,045.00 °C
3
639.50 °C
99+
Boiling Point
5,027.00 °C
6
3,235.00 °C
24
Appearance
Physical State
Solid
Solid
Color
Silvery Bluish-Gray
Silvery White
Luster
Metallic
NA
Hardness
Mohs Hardness
7.00
3
Not Available
Brinell Hardness
3,490.00 MPa
1
Not Available
Speed of Sound
4,940.00 m/s
11
2,260.00 m/s
99+
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
Os
Pu
Isotopes
Known Isotopes
35
4
20
19
Electronegativity
Pauling Electronegativity
2.20
4
1.28
33
Allred Rochow Electronegativity
1.52
12
1.22
26
Allen Electronegativity
1.65
19
Not Available
Electropositivity
Pauling Electropositivity
1.80
99+
2.72
21
Ionization Energies
1st Energy Level
840.00 kJ/mol
12
584.70 kJ/mol
99+
2nd Energy Level
1,309.80 kJ/mol
99+
1,128.00 kJ/mol
99+
3rd Energy Level
1,600.00 kJ/mol
99+
2,084.00 kJ/mol
99+
4th Energy Level
Not Available
3,338.00 kJ/mol
99+
Electrochemical Equivalent
1.77 g/amp-hr
38
2.28 g/amp-hr
22
Electron Work Function
4.83 eV
8
Not Available
Other Chemical Properties
Chemical Stability, Ionization, Solubility
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
Atomic Properties
Atomic Number
76
40
94
24
Electron Configuration
[Xe] 4f14 5d6 6s2
[Rn] 5f6 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Monoclinic (MON)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
MON-Crystal-Structure-of-Plutonium.jpg#100
Atom
Number of Protons
76
39
94
24
Number of Neutrons
114
25
150
11
Number of Electrons
76
39
94
24
Radius of an Atom
Atomic Radius
133.80 pm
99+
159.00 pm
28
Covalent Radius
Not Available
187.00 pm
20
Van der Waals Radius
216.00 pm
24
200.00 pm
28
Atomic Weight
190.23 amu
35
244.00 amu
19
Atomic Volume
8.49 cm3/mol
99+
12.32 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
91.40 (-eV)
12
64.90 (-eV)
21
Lattice Constant
273.44 pm
99+
618.30 pm
4
Lattice Angles
π/2, π/2, 2 π/3
NA
Lattice C/A Ratio
1.58
14
Not Available
Mechanical Properties
Density
Density At Room Temperature
22.59 g/cm3
9
19.82 g/cm3
13
Density When Liquid (at m.p.)
20.00 g/cm3
1
16.63 g/cm3
8
Tensile Strength
1,000.00 MPa
4
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
26
Vapor Pressure at 2000 K
0.00 (Pa)
28
2.20 (Pa)
12
Elasticity properties
Shear Modulus
222.00 GPa
1
43.00 GPa
18
Bulk Modulus
462.00 GPa
1
Not Available
Young's Modulus
Not Available
96.00 GPa
21
Poisson Ratio
0.25
24
0.21
32
Other Mechanical Properties
Ductile
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
22.57
2
19.84
7
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Poor Conductor
Resistivity
81.20 nΩ·m
35
1.46 nΩ·m
99+
Electrical Conductivity
0.11 106/cm Ω
18
0.01 106/cm Ω
99+
Electron Affinity
106.10 kJ/mol
9
Not Available
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.13 J/(kg K)
39
Molar Heat Capacity
24.70 J/mol·K
99+
35.50 J/mol·K
3
Thermal Conductivity
87.60 W/m·K
19
6.74 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
5.10 µm/(m·K)
99+
46.70 µm/(m·K)
6
Enthalpy
Enthalpy of Vaporization
627.60 kJ/mol
7
344.00 kJ/mol
25
Enthalpy of Fusion
29.30 kJ/mol
4
2.82 kJ/mol
99+
Enthalpy of Atomization
669.00 kJ/mol
6
360.00 kJ/mol
26
Standard Molar Entropy
32.60 J/mol.K
99+
Not Available
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