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Iridium
Iridium

Francium
Francium



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Iridium
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Francium

Iridium Francium Comparison

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1 Periodic Table
1.1 Symbol
Ir
Fr
1.2 Group Number
Tennessine Metal
9
Rank: 9 (Overall)
1
Rank: 17 (Overall)
Gadolinium Metal
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1.6 Period Number
Uranium Metal
6
Rank: 2 (Overall)
7
Rank: 1 (Overall)
Lithium Metal
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1.9 Block
d block
s block
1.10 Element Family
Transition Metal
Alkali
1.11 CAS Number
Roentgenium Met..
7439885
Rank: 89 (Overall)
7440735
Rank: 18 (Overall)
Aluminium Metal
2.5 Space Group Name
Fm_ 3m
Not Available
2.6 Space Group Number
Sodium Metal
225.00
Rank: 2 (Overall)
Not Available
Rank: N/A (Overall)
Plutonium Metal
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3 Facts
3.1 Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
3.2 Sources
Found in Minerals, Mining, Ores of Minerals
Formed by Decay Process, Mining
3.3 History
3.3.1 Who Discovered
Smithson Tennant
Marguerite Perey
3.3.2 Discovery
In 1803
In 1939
3.4 Abundance
3.4.1 Abundance In Universe
Iron Metal
2 * 10-7 %
Rank: 22 (Overall)
Not Available
Rank: N/A (Overall)
Thallium Metal
3.4.3 Abundance In Sun
Iron Metal
~0.0000002 %
Rank: 25 (Overall)
~-9999 %
Rank: N/A (Overall)
Beryllium Metal
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3.4.5 Abundance In Meteorites
Iron Metal
0.00 %
Rank: 29 (Overall)
Not Available
Rank: N/A (Overall)
Gold Metal
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3.4.7 Abundance In Earth's Crust
Aluminium Metal
0.00 %
Rank: 56 (Overall)
Not Available
Rank: N/A (Overall)
Radium Metal
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3.4.9 Abundance In Oceans
Sodium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Protactinium Metal
3.4.10 Abundance In Humans
Calcium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Radium Metal
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5 Uses
5.1 Uses & Benefits
  • 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.
  • Francium has no known uses as it has a half life of only 22 minutes.
5.1.1 Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
NA
5.1.2 Medical Uses
NA
NA
5.1.3 Other Uses
Alloys
NA
5.2 Biological Properties
5.2.1 Toxicity
Toxic
NA
5.2.2 Present in Human Body
60% Transition Metals Metals have it !
83% Alkali Metals Metals have it !
5.2.3 In Blood
Sodium Metal
Not Available
Rank: N/A (Overall)
0.00 Blood/mg dm-3
Rank: 37 (Overall)
Plutonium Metal
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5.2.5 In Bone
Calcium Metal
Not Available
Rank: N/A (Overall)
0.00 p.p.m.
Rank: 36 (Overall)
Plutonium Metal
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7 Physical
7.1 Melting Point
Tungsten Metal
2,410.00 °C
Rank: 7 (Overall)
27.00 °C
Rank: 81 (Overall)
Francium Metal
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7.3 Boiling Point
Tungsten Metal
4,527.00 °C
Rank: 10 (Overall)
677.00 °C
Rank: 76 (Overall)
Flerovium Metal
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7.6 Appearance
7.6.1 Physical State
Solid
Solid
7.6.2 Color
Silvery White
NA
7.6.3 Luster
Metallic
NA
7.7 Hardness
7.7.1 Mohs Hardness
Chromium Metal
6.50
Rank: 5 (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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7.7.3 Brinell Hardness
Osmium Metal
1,670.00 MPa
Rank: 5 (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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7.7.4 Vickers Hardness
Tungsten Metal
1,760.00 MPa
Rank: 3 (Overall)
Not Available
Rank: N/A (Overall)
Palladium Metal
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7.8 Speed of Sound
Technetium Metal
4,825.00 m/s
Rank: 13 (Overall)
Not Available
Rank: N/A (Overall)
Thallium Metal
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7.10 Optical Properties
7.10.1 Refractive Index
Palladium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury Metal
7.11.2 Reflectivity
Silver Metal
78.00 %
Rank: 6 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
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7.12 Allotropes
6% Transition Metals Metals have it !
No Alkali Metals Metals has it !
7.12.1 α Allotropes
Not Available
Not Available
7.12.2 β Allotropes
Not Available
Not Available
7.12.3 γ Allotropes
Not Available
Not Available
8 Chemical
8.1 Chemical Formula
Ir
Fr
8.2 Isotopes
8.2.1 Known Isotopes
Palladium Metal
34
Rank: 5 (Overall)
33
Rank: 6 (Overall)
Tennessine Metal
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9.3 Electronegativity
9.3.1 Pauling Electronegativity
Gold Metal
2.20
Rank: 4 (Overall)
0.70
Rank: 53 (Overall)
Francium Metal
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9.4.2 Sanderson Electronegativity
Cobalt Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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9.4.4 Allred Rochow Electronegativity
Gallium Metal
1.55
Rank: 11 (Overall)
0.86
Rank: 41 (Overall)
Cesium Metal
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9.4.6 Mulliken-Jaffe Electronegativity
Polonium Metal
Not Available
Rank: N/A (Overall)
0.68
Rank: 25 (Overall)
Cesium Metal
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9.4.8 Allen Electronegativity
Berkelium Metal
1.68
Rank: 17 (Overall)
0.67
Rank: 47 (Overall)
Cesium Metal
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9.5 Electropositivity
9.5.1 Pauling Electropositivity
Francium Metal
1.80
Rank: 49 (Overall)
3.30
Rank: 1 (Overall)
Gold Metal
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9.6 Ionization Energies
9.6.1 1st Energy Level
Chromium Metal
880.00 kJ/mol
Rank: 9 (Overall)
380.00 kJ/mol
Rank: 89 (Overall)
Cesium Metal
9.7.2 2nd Energy Level
Chromium Metal
1,600.00 kJ/mol
Rank: 35 (Overall)
Not Available
Rank: N/A (Overall)
Ruthenium Metal
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9.8.2 3rd Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Osmium Metal
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9.8.4 4th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Thorium Metal
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9.8.6 5th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Dubnium Metal
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9.8.9 6th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium Metal
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9.8.11 7th Energy level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bohrium Metal
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9.8.13 8th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Hassium Metal
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9.8.15 9th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium Metal
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9.8.17 10th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Strontium Metal
9.8.19 11th Energy Level
Magnesium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium Metal
9.8.21 12th Energy Level
Magnesium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.23 13th Energy Level
Titanium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.26 14th Energy Level
Vanadium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.28 15th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Manganese Metal
9.8.30 16th Energy Level
Manganese Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Iron Metal
9.8.32 17th Energy Level
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cobalt Metal
9.8.34 18th Energy Level
Cobalt Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Nickel Metal
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9.8.36 19th Energy Level
Nickel Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Copper Metal
9.8.38 20th Energy Level
Zinc Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.40 21st Energy Level
Zinc Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.42 22nd Energy Level
Copper Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.44 23rd Energy Level
Copper Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.46 24th Energy Level
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
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9.8.48 25th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.50 26th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.52 27th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.54 28th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.56 29th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.8.58 30th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
9.10 Electrochemical Equivalent
Francium Metal
1.14 g/amp-hr
Rank: 54 (Overall)
8.32 g/amp-hr
Rank: 1 (Overall)
Beryllium Metal
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9.12 Electron Work Function
Platinum Metal
4.55 eV
Rank: 13 (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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10.2 Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
11 Atomic
11.1 Atomic Number
Tennessine Metal
77
Rank: 39 (Overall)
87
Rank: 31 (Overall)
Lithium Metal
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11.5 Electron Configuration
[Xe] 4f14 5d7 6s2
[Rn] 7s1
11.6 Crystal Structure
Face Centered Cubic (FCC)
Body Centered Cubic (BCC)
11.6.1 Crystal Lattice
11.7 Atom
11.7.1 Number of Protons
Tennessine Metal
74
Rank: 41 (Overall)
87
Rank: 31 (Overall)
Lithium Metal
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11.7.3 Number of Neutrons
Flerovium Metal
110
Rank: 27 (Overall)
136
Rank: 17 (Overall)
Lithium Metal
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11.7.5 Number of Electrons
Tennessine Metal
74
Rank: 41 (Overall)
87
Rank: 31 (Overall)
Lithium Metal
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11.9 Radius of an Atom
11.9.1 Atomic Radius
Cesium Metal
136.00 pm
Rank: 41 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
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11.9.3 Covalent Radius
Francium Metal
141.00 pm
Rank: 43 (Overall)
260.00 pm
Rank: 1 (Overall)
Beryllium Metal
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11.9.5 Van der Waals Radius
Francium Metal
202.00 pm
Rank: 27 (Overall)
348.00 pm
Rank: 1 (Overall)
Zinc Metal
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11.11 Atomic Weight
Tennessine Metal
192.22 amu
Rank: 34 (Overall)
223.00 amu
Rank: 27 (Overall)
Lithium Metal
11.13 Atomic Volume
Cesium Metal
9.53 cm3/mol
Rank: 50 (Overall)
Not Available
Rank: N/A (Overall)
Manganese Metal
11.14 Adjacent Atomic Numbers
11.14.1 Previous Element
11.14.2 Next Element
11.15 Valence Electron Potential
Platinum Metal
140.00 (-eV)
Rank: 5 (Overall)
8.00 (-eV)
Rank: 67 (Overall)
Francium Metal
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11.18 Lattice Constant
Manganese Metal
383.90 pm
Rank: 26 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
11.20 Lattice Angles
π/2, π/2, π/2
NA
11.22 Lattice C/A Ratio
Cadmium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
12 Mechanical
12.1 Density
12.1.1 Density At Room Temperature
Hassium Metal
22.56 g/cm3
Rank: 10 (Overall)
1.87 g/cm3
Rank: 77 (Overall)
Lithium Metal
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13.1.2 Density When Liquid (at m.p.)
Osmium Metal
19.00 g/cm3
Rank: 3 (Overall)
Not Available
Rank: N/A (Overall)
Lithium Metal
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13.2 Tensile Strength
Iron Metal
2,000.00 MPa
Rank: 2 (Overall)
Not Available
Rank: N/A (Overall)
Indium Metal
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13.5 Viscosity
Mercury Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury Metal
13.7 Vapor Pressure
13.7.1 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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13.7.3 Vapor Pressure at 2000 K
Chromium Metal
0.00 (Pa)
Rank: 25 (Overall)
Not Available
Rank: N/A (Overall)
Tungsten Metal
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13.9 Elasticity properties
13.9.1 Shear Modulus
Osmium Metal
210.00 GPa
Rank: 2 (Overall)
Not Available
Rank: N/A (Overall)
Potassium Metal
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13.10.1 Bulk Modulus
Osmium Metal
320.00 GPa
Rank: 3 (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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14.1.2 Young's Modulus
Iridium Metal
528.00 GPa
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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14.2 Poisson Ratio
Gallium Metal
0.26
Rank: 22 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
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14.3 Other Mechanical Properties
NA
NA
15 Magnetic
15.1 Magnetic Characteristics
15.1.1 Specific Gravity
Cobalt Metal
21.78
Rank: 3 (Overall)
Not Available
Rank: N/A (Overall)
Lithium Metal
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15.2.3 Magnetic Ordering
Paramagnetic
Paramagnetic
15.2.4 Permeability
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth Metal
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15.2.6 Susceptibility
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth Metal
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15.3 Electrical Properties
15.3.1 Electrical Property
Conductor
Poor Conductor
15.3.2 Resistivity
Mercury Metal
47.10 nΩ·m
Rank: 44 (Overall)
3.00 nΩ·m
Rank: 52 (Overall)
Thallium Metal
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16.1.1 Electrical Conductivity
Silver Metal
0.19 106/cm Ω
Rank: 10 (Overall)
0.03 106/cm Ω
Rank: 40 (Overall)
Plutonium Metal
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16.2.1 Electron Affinity
Gold Metal
151.00 kJ/mol
Rank: 4 (Overall)
Not Available
Rank: N/A (Overall)
Mercury Metal
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17 Thermal
17.1 Specific Heat
Lithium Metal
0.13 J/(kg K)
Rank: 39 (Overall)
Not Available
Rank: N/A (Overall)
Americium Metal
17.3 Molar Heat Capacity
Americium Metal
25.10 J/mol·K
Rank: 43 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
17.5 Thermal Conductivity
Silver Metal
147.00 W/m·K
Rank: 10 (Overall)
15.00 W/m·K
Rank: 54 (Overall)
Neptunium Metal
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17.7 Critical Temperature
Lithium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Ytterbium Metal
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17.8 Thermal Expansion
Cesium Metal
6.40 µm/(m·K)
Rank: 51 (Overall)
Not Available
Rank: N/A (Overall)
Tungsten Metal
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17.9 Enthalpy
17.9.1 Enthalpy of Vaporization
Tungsten Metal
799.10 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Zinc Metal
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17.9.3 Enthalpy of Fusion
Tungsten Metal
35.23 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Cesium Metal
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17.10.1 Enthalpy of Atomization
Tungsten Metal
837.00 kJ/mol
Rank: 1 (Overall)
71.00 kJ/mol
Rank: 61 (Overall)
Mercury Metal
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17.11 Standard Molar Entropy
Protactinium Me..
35.50 J/mol.K
Rank: 43 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
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