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Molybdenum
Molybdenum

Iridium
Iridium



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Molybdenum
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Iridium

Molybdenum Iridium Comparison

1 Periodic Table
1.1 Symbol
Mo
Ir
1.2 Group Number
Tennessine Metal
6
Rank: 12 (Overall)
9
Rank: 9 (Overall)
Gadolinium Metal
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1.3 Period Number
Uranium Metal
5
Rank: 3 (Overall)
6
Rank: 2 (Overall)
Lithium Metal
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1.4 Block
d block
d block
1.5 Element Family
Transition Metal
Transition Metal
1.6 CAS Number
Roentgenium Met..
7439987
Rank: 80 (Overall)
7439885
Rank: 89 (Overall)
Aluminium Metal
1.7 Space Group Name
Im_ 3m
Fm_ 3m
1.8 Space Group Number
Sodium Metal
229.00
Rank: 1 (Overall)
225.00
Rank: 2 (Overall)
Plutonium Metal
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2 Facts
2.1 Interesting Facts
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Carl Wilhelm Scheele
Smithson Tennant
2.3.2 Discovery
In 1778
In 1803
2.4 Abundance
2.4.1 Abundance In Universe
Iron Metal
5 * 10-7 %
Rank: 19 (Overall)
2 * 10-7 %
Rank: 22 (Overall)
Thallium Metal
2.4.2 Abundance In Sun
Iron Metal
~0.0000009 %
Rank: 19 (Overall)
~0.0000002 %
Rank: 25 (Overall)
Beryllium Metal
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2.4.3 Abundance In Meteorites
Iron Metal
0.00 %
Rank: 24 (Overall)
0.00 %
Rank: 29 (Overall)
Gold Metal
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2.4.4 Abundance In Earth's Crust
Aluminium Metal
0.00 %
Rank: 39 (Overall)
0.00 %
Rank: 56 (Overall)
Radium Metal
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2.4.5 Abundance In Oceans
Sodium Metal
0.00 %
Rank: 9 (Overall)
Not Available
Rank: N/A (Overall)
Protactinium Metal
2.4.6 Abundance In Humans
Calcium Metal
0.00 %
Rank: 14 (Overall)
Not Available
Rank: N/A (Overall)
Radium Metal
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3 Uses
3.1 Uses & Benefits
  • Its alloys are used to make engine parts, drills, saw blade, etc.
  • Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.
  • Iridium has an anti corrosion properties and it is used in special alloy with Osmium metal and that alloy is used in pen tips and compass bearings.
3.1.1 Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry
Automobile Industry, Electrical Industry, Electronic Industry
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Toxic
Toxic
3.2.2 Present in Human Body
60% Transition Metals Metals have it !
60% Transition Metals Metals have it !
3.2.3 In Blood
Sodium Metal
0.00 Blood/mg dm-3
Rank: 31 (Overall)
Not Available
Rank: N/A (Overall)
Plutonium Metal
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3.2.4 In Bone
Calcium Metal
0.70 p.p.m.
Rank: 18 (Overall)
Not Available
Rank: N/A (Overall)
Plutonium Metal
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4 Physical
4.1 Melting Point
Tungsten Metal
2,617.00 °C
Rank: 5 (Overall)
2,410.00 °C
Rank: 7 (Overall)
Francium Metal
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4.2 Boiling Point
Tungsten Metal
4,612.00 °C
Rank: 9 (Overall)
4,527.00 °C
Rank: 10 (Overall)
Flerovium Metal
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Gray
Silvery White
4.3.3 Luster
Metallic
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
Chromium Metal
5.50
Rank: 7 (Overall)
6.50
Rank: 5 (Overall)
Cesium Metal
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4.4.2 Brinell Hardness
Osmium Metal
1,370.00 MPa
Rank: 7 (Overall)
1,670.00 MPa
Rank: 5 (Overall)
Cesium Metal
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4.4.3 Vickers Hardness
Tungsten Metal
1,400.00 MPa
Rank: 6 (Overall)
1,760.00 MPa
Rank: 3 (Overall)
Palladium Metal
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4.5 Speed of Sound
Technetium Metal
5,400.00 m/s
Rank: 6 (Overall)
4,825.00 m/s
Rank: 13 (Overall)
Thallium Metal
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4.6 Optical Properties
4.6.1 Refractive Index
Palladium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury Metal
4.6.2 Reflectivity
Silver Metal
58.00 %
Rank: 15 (Overall)
78.00 %
Rank: 6 (Overall)
Molybdenum Metal
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4.7 Allotropes
6% Transition Metals Metals have it !
6% Transition Metals Metals have it !
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Mo
Ir
5.2 Isotopes
5.2.1 Known Isotopes
Palladium Metal
25
Rank: 14 (Overall)
34
Rank: 5 (Overall)
Tennessine Metal
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold Metal
2.16
Rank: 5 (Overall)
2.20
Rank: 4 (Overall)
Francium Metal
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5.3.2 Sanderson Electronegativity
Cobalt Metal
1.15
Rank: 19 (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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5.3.3 Allred Rochow Electronegativity
Gallium Metal
1.30
Rank: 24 (Overall)
1.55
Rank: 11 (Overall)
Cesium Metal
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5.3.4 Mulliken-Jaffe Electronegativity
Polonium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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5.3.5 Allen Electronegativity
Berkelium Metal
2.16
Rank: 3 (Overall)
1.68
Rank: 17 (Overall)
Cesium Metal
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium Metal
1.84
Rank: 48 (Overall)
1.80
Rank: 49 (Overall)
Gold Metal
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium Metal
684.30 kJ/mol
Rank: 37 (Overall)
880.00 kJ/mol
Rank: 9 (Overall)
Cesium Metal
5.5.2 2nd Energy Level
Chromium Metal
1,560.00 kJ/mol
Rank: 37 (Overall)
1,600.00 kJ/mol
Rank: 35 (Overall)
Ruthenium Metal
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5.5.3 3rd Energy Level
Chromium Metal
2,618.00 kJ/mol
Rank: 43 (Overall)
Not Available
Rank: N/A (Overall)
Osmium Metal
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5.5.4 4th Energy Level
Chromium Metal
4,480.00 kJ/mol
Rank: 26 (Overall)
Not Available
Rank: N/A (Overall)
Thorium Metal
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5.5.5 5th Energy Level
Chromium Metal
5,257.00 kJ/mol
Rank: 32 (Overall)
Not Available
Rank: N/A (Overall)
Dubnium Metal
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5.5.6 6th Energy Level
Chromium Metal
6,640.80 kJ/mol
Rank: 22 (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium Metal
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5.5.7 7th Energy level
Chromium Metal
12,125.00 kJ/mol
Rank: 13 (Overall)
Not Available
Rank: N/A (Overall)
Bohrium Metal
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5.5.8 8th Energy Level
Chromium Metal
13,860.00 kJ/mol
Rank: 16 (Overall)
Not Available
Rank: N/A (Overall)
Hassium Metal
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5.5.9 9th Energy Level
Chromium Metal
15,835.00 kJ/mol
Rank: 16 (Overall)
Not Available
Rank: N/A (Overall)
Yttrium Metal
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5.5.10 10th Energy Level
Chromium Metal
17,980.00 kJ/mol
Rank: 18 (Overall)
Not Available
Rank: N/A (Overall)
Strontium Metal
5.5.11 11th Energy Level
Magnesium Metal
20,190.00 kJ/mol
Rank: 17 (Overall)
Not Available
Rank: N/A (Overall)
Yttrium Metal
5.5.12 12th Energy Level
Magnesium Metal
22,219.00 kJ/mol
Rank: 15 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.13 13th Energy Level
Titanium Metal
26,930.00 kJ/mol
Rank: 13 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.14 14th Energy Level
Vanadium Metal
29,196.00 kJ/mol
Rank: 13 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.15 15th Energy Level
Chromium Metal
52,490.00 kJ/mol
Rank: 7 (Overall)
Not Available
Rank: N/A (Overall)
Manganese Metal
5.5.16 16th Energy Level
Manganese Metal
55,000.00 kJ/mol
Rank: 8 (Overall)
Not Available
Rank: N/A (Overall)
Iron Metal
5.5.17 17th Energy Level
Iron Metal
61,400.00 kJ/mol
Rank: 9 (Overall)
Not Available
Rank: N/A (Overall)
Cobalt Metal
5.5.18 18th Energy Level
Cobalt Metal
67,700.00 kJ/mol
Rank: 9 (Overall)
Not Available
Rank: N/A (Overall)
Nickel Metal
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5.5.19 19th Energy Level
Nickel Metal
74,000.00 kJ/mol
Rank: 9 (Overall)
Not Available
Rank: N/A (Overall)
Copper Metal
5.5.20 20th Energy Level
Zinc Metal
80,400.00 kJ/mol
Rank: 10 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.21 21st Energy Level
Zinc Metal
87,000.00 kJ/mol
Rank: 9 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.22 22nd Energy Level
Copper Metal
93,400.00 kJ/mol
Rank: 7 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.23 23rd Energy Level
Copper Metal
98,420.00 kJ/mol
Rank: 6 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.24 24th Energy Level
Iron Metal
104,400.00 kJ/mol
Rank: 2 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
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5.5.25 25th Energy Level
Molybdenum Metal
121,900.00 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.26 26th Energy Level
Molybdenum Metal
127,700.00 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.27 27th Energy Level
Molybdenum Metal
133,800.00 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.28 28th Energy Level
Molybdenum Metal
139,800.00 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.29 29th Energy Level
Molybdenum Metal
148,100.00 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.30 30th Energy Level
Molybdenum Metal
154,500.00 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.6 Electrochemical Equivalent
Francium Metal
0.89 g/amp-hr
Rank: 60 (Overall)
1.14 g/amp-hr
Rank: 54 (Overall)
Beryllium Metal
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5.7 Electron Work Function
Platinum Metal
4.60 eV
Rank: 12 (Overall)
4.55 eV
Rank: 13 (Overall)
Cesium Metal
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5.8 Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Flammable, Ionization, Radioactive Isotopes, Radioactivity
6 Atomic
6.1 Atomic Number
Tennessine Metal
42
Rank: 70 (Overall)
77
Rank: 39 (Overall)
Lithium Metal
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6.2 Electron Configuration
[Kr] 4d5 5s1
[Xe] 4f14 5d7 6s2
6.3 Crystal Structure
Body Centered Cubic (BCC)
Face Centered Cubic (FCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine Metal
42
Rank: 69 (Overall)
74
Rank: 41 (Overall)
Lithium Metal
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6.4.2 Number of Neutrons
Flerovium Metal
54
Rank: 52 (Overall)
110
Rank: 27 (Overall)
Lithium Metal
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6.4.3 Number of Electrons
Tennessine Metal
42
Rank: 69 (Overall)
74
Rank: 41 (Overall)
Lithium Metal
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium Metal
139.00 pm
Rank: 39 (Overall)
136.00 pm
Rank: 41 (Overall)
Beryllium Metal
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6.5.2 Covalent Radius
Francium Metal
154.00 pm
Rank: 32 (Overall)
141.00 pm
Rank: 43 (Overall)
Beryllium Metal
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6.5.3 Van der Waals Radius
Francium Metal
200.00 pm
Rank: 28 (Overall)
202.00 pm
Rank: 27 (Overall)
Zinc Metal
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6.6 Atomic Weight
Tennessine Metal
95.95 amu
Rank: 64 (Overall)
192.22 amu
Rank: 34 (Overall)
Lithium Metal
6.7 Atomic Volume
Cesium Metal
9.40 cm3/mol
Rank: 51 (Overall)
9.53 cm3/mol
Rank: 50 (Overall)
Manganese Metal
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
Platinum Metal
88.60 (-eV)
Rank: 13 (Overall)
140.00 (-eV)
Rank: 5 (Overall)
Francium Metal
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6.10 Lattice Constant
Manganese Metal
314.70 pm
Rank: 57 (Overall)
383.90 pm
Rank: 26 (Overall)
Beryllium Metal
6.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
6.12 Lattice C/A Ratio
Cadmium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium Metal
10.28 g/cm3
Rank: 36 (Overall)
22.56 g/cm3
Rank: 10 (Overall)
Lithium Metal
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7.1.2 Density When Liquid (at m.p.)
Osmium Metal
9.33 g/cm3
Rank: 20 (Overall)
19.00 g/cm3
Rank: 3 (Overall)
Lithium Metal
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7.2 Tensile Strength
Iron Metal
324.00 MPa
Rank: 13 (Overall)
2,000.00 MPa
Rank: 2 (Overall)
Indium Metal
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7.3 Viscosity
Mercury Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury Metal
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
Strontium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cerium Metal
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7.4.2 Vapor Pressure at 2000 K
Chromium Metal
0.00 (Pa)
Rank: 26 (Overall)
0.00 (Pa)
Rank: 25 (Overall)
Tungsten Metal
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7.5 Elasticity properties
7.5.1 Shear Modulus
Osmium Metal
126.00 GPa
Rank: 8 (Overall)
210.00 GPa
Rank: 2 (Overall)
Potassium Metal
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7.5.2 Bulk Modulus
Osmium Metal
230.00 GPa
Rank: 6 (Overall)
320.00 GPa
Rank: 3 (Overall)
Cesium Metal
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7.5.3 Young's Modulus
Iridium Metal
329.00 GPa
Rank: 6 (Overall)
528.00 GPa
Rank: 1 (Overall)
Cesium Metal
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7.6 Poisson Ratio
Gallium Metal
0.31
Rank: 13 (Overall)
0.26
Rank: 22 (Overall)
Beryllium Metal
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7.7 Other Mechanical Properties
Ductile, Weldable
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt Metal
10.22
Rank: 27 (Overall)
21.78
Rank: 3 (Overall)
Lithium Metal
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8.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
8.1.3 Permeability
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth Metal
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8.1.4 Susceptibility
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth Metal
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8.2 Electrical Properties
8.2.1 Electrical Property
Semiconductor
Conductor
8.2.2 Resistivity
Mercury Metal
53.40 nΩ·m
Rank: 41 (Overall)
47.10 nΩ·m
Rank: 44 (Overall)
Thallium Metal
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8.2.3 Electrical Conductivity
Silver Metal
0.19 106/cm Ω
Rank: 11 (Overall)
0.19 106/cm Ω
Rank: 10 (Overall)
Plutonium Metal
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8.2.4 Electron Affinity
Gold Metal
71.90 kJ/mol
Rank: 14 (Overall)
151.00 kJ/mol
Rank: 4 (Overall)
Mercury Metal
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9 Thermal
9.1 Specific Heat
Lithium Metal
0.25 J/(kg K)
Rank: 21 (Overall)
0.13 J/(kg K)
Rank: 39 (Overall)
Americium Metal
9.2 Molar Heat Capacity
Americium Metal
24.06 J/mol·K
Rank: 54 (Overall)
25.10 J/mol·K
Rank: 43 (Overall)
Beryllium Metal
9.3 Thermal Conductivity
Silver Metal
138.00 W/m·K
Rank: 12 (Overall)
147.00 W/m·K
Rank: 10 (Overall)
Neptunium Metal
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9.4 Critical Temperature
Lithium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Ytterbium Metal
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9.5 Thermal Expansion
Cesium Metal
4.80 µm/(m·K)
Rank: 58 (Overall)
6.40 µm/(m·K)
Rank: 51 (Overall)
Tungsten Metal
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten Metal
594.10 kJ/mol
Rank: 8 (Overall)
799.10 kJ/mol
Rank: 1 (Overall)
Zinc Metal
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9.6.2 Enthalpy of Fusion
Tungsten Metal
27.61 kJ/mol
Rank: 5 (Overall)
35.23 kJ/mol
Rank: 1 (Overall)
Cesium Metal
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9.6.3 Enthalpy of Atomization
Tungsten Metal
653.00 kJ/mol
Rank: 7 (Overall)
837.00 kJ/mol
Rank: 1 (Overall)
Mercury Metal
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9.7 Standard Molar Entropy
Protactinium Me..
28.70 J/mol.K
Rank: 53 (Overall)
35.50 J/mol.K
Rank: 43 (Overall)
Beryllium Metal
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