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Iron
Iron

Chromium
Chromium



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Iron
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Iron vs Chromium

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1 Periodic Table
1.1 Symbol
Fe
Cr
1.2 Group Number
Tennessine
8
Rank: 10 (Overall)
6
Rank: 12 (Overall)
Gadolinium
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1.3 Period Number
Uranium
4
Rank: 4 (Overall)
4
Rank: 4 (Overall)
Lithium
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1.4 Block
d block
d block
1.5 Element Family
Transition Metal
Transition Metal
1.6 CAS Number
Roentgenium
7439896
Rank: 88 (Overall)
7440473
Rank: 39 (Overall)
Aluminium
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1.7 Space Group Name
Im_ 3m
Im_ 3m
1.8 Space Group Number
Sodium
229.00
Rank: 1 (Overall)
229.00
Rank: 1 (Overall)
Plutonium
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2 Facts
2.1 Interesting Facts
  • Iron is not always magnetic in nature, its allotrope are ferromagnetic and the B allotrope is nonmagnetic.
  • The blood consists Iron in hemoglobin molecules to transfer Oxygen in the body.
  • Chromium is highly reactive, hence it is not found free in nature.
  • Ores of Chromites mineral are the major source of Chromium metal.
  • Almost 90% leather tanning is done with the help of chromium.
2.2 Sources
Earth's crust, Found in Minerals
Found in Minerals, Mining, Ores of metals, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Unknown
Louis Nicolas Vauquelin
2.3.2 Discovery
Before 5000 BC
In Between 1797 - 1798
2.4 Abundance
2.4.1 Abundance In Universe
Iron
1.1 * 10-1 %
Rank: 1 (Overall)
1.5 * 10-3 %
Rank: 7 (Overall)
Thallium
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2.4.2 Abundance In Sun
Iron
~0.1 %
Rank: 1 (Overall)
~0.002 %
Rank: 7 (Overall)
Beryllium
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2.4.3 Abundance In Meteorites
Iron
22.00 %
Rank: 1 (Overall)
0.30 %
Rank: 7 (Overall)
Gold
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2.4.4 Abundance In Earth's Crust
Aluminium
6.30 %
Rank: 2 (Overall)
0.01 %
Rank: 13 (Overall)
Radium
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2.4.5 Abundance In Oceans
Sodium
0.00 %
Rank: 12 (Overall)
0.00 %
Rank: 16 (Overall)
Protactinium
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2.4.6 Abundance In Humans
Calcium
0.01 %
Rank: 5 (Overall)
0.00 %
Rank: 16 (Overall)
Radium
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3 Uses
3.1 Uses & Benefits
  • Iron metal alloy steel is used in the application of civil engineering and manufacturing.
  • Alloys of iron with nickel, vanadium, chromium, tungsten and manganese have very useful properties.
  • It is used to harden the steel and produces a stainless steel and other various alloys.
  • It is also used to give proper finish to polished mirrors. Its chromium plates are used in bathroom fittings.
3.1.1 Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Automobile Industry, Chemical Industry
3.1.2 Medical Uses
Pharmaceutical Industry, Surgical Instruments Manufacturing
NA
3.1.3 Other Uses
Alloys, Sculptures, Statues
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Non Toxic
Highly 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
447.00 Blood/mg dm-3
Rank: 3 (Overall)
0.11 Blood/mg dm-3
Rank: 12 (Overall)
Plutonium
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3.2.4 In Bone
Calcium
380.00 p.p.m.
Rank: 5 (Overall)
0.33 p.p.m.
Rank: 21 (Overall)
Plutonium
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4 Physical
4.1 Melting Point
Tungsten
1,535.00 °C
Rank: 25 (Overall)
1,857.00 °C
Rank: 14 (Overall)
Francium
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4.2 Boiling Point
Tungsten
2,750.00 °C
Rank: 37 (Overall)
2,672.00 °C
Rank: 39 (Overall)
Flerovium
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Gray
Silver
4.3.3 Luster
Metallic
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
Chromium
4.00
Rank: 10 (Overall)
8.50
Rank: 1 (Overall)
Cesium
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4.4.2 Brinell Hardness
Osmium
200.00 MPa
Rank: 40 (Overall)
687.00 MPa
Rank: 16 (Overall)
Cesium
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4.4.3 Vickers Hardness
Tungsten
608.00 MPa
Rank: 18 (Overall)
1,060.00 MPa
Rank: 10 (Overall)
Palladium
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4.5 Speed of Sound
Technetium
5,120.00 m/s
Rank: 8 (Overall)
5,940.00 m/s
Rank: 5 (Overall)
Thallium
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4.6 Optical Properties
4.6.1 Refractive Index
Palladium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
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4.6.2 Reflectivity
Silver
65.00 %
Rank: 12 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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4.7 Allotropes
6% Transition Metals Metals have it !
6% Transition Metals Metals have it !
4.7.1 α Allotropes
Ferrite (alpha Iron)
Not Available
4.7.2 β Allotropes
beta Iron
Not Available
4.7.3 γ Allotropes
gamma Iron
Not Available
5 Chemical
5.1 Chemical Formula
Fe
Cr
5.2 Isotopes
5.2.1 Known Isotopes
Palladium
26
Rank: 13 (Overall)
21
Rank: 18 (Overall)
Tennessine
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold
1.83
Rank: 14 (Overall)
1.66
Rank: 18 (Overall)
Francium
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5.3.2 Sanderson Electronegativity
Cobalt
2.20
Rank: 7 (Overall)
1.66
Rank: 14 (Overall)
Cesium
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5.3.3 Allred Rochow Electronegativity
Gallium
1.64
Rank: 8 (Overall)
1.56
Rank: 10 (Overall)
Cesium
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5.3.4 Mulliken-Jaffe Electronegativity
Polonium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.3.5 Allen Electronegativity
Berkelium
1.80
Rank: 12 (Overall)
1.65
Rank: 19 (Overall)
Cesium
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium
2.17
Rank: 40 (Overall)
2.34
Rank: 36 (Overall)
Gold
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium
762.50 kJ/mol
Rank: 17 (Overall)
26,130.00 kJ/mol
Rank: 1 (Overall)
Cesium
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5.5.2 2nd Energy Level
Chromium
1,561.90 kJ/mol
Rank: 36 (Overall)
28,750.00 kJ/mol
Rank: 1 (Overall)
Ruthenium
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5.5.3 3rd Energy Level
Chromium
2,957.00 kJ/mol
Rank: 29 (Overall)
34,230.00 kJ/mol
Rank: 1 (Overall)
Osmium
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5.5.4 4th Energy Level
Chromium
5,290.00 kJ/mol
Rank: 16 (Overall)
37,066.00 kJ/mol
Rank: 1 (Overall)
Thorium
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5.5.5 5th Energy Level
Chromium
7,240.00 kJ/mol
Rank: 16 (Overall)
97,510.00 kJ/mol
Rank: 1 (Overall)
Dubnium
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5.5.6 6th Energy Level
Chromium
9,560.00 kJ/mol
Rank: 14 (Overall)
105,800.00 kJ/mol
Rank: 1 (Overall)
Seaborgium
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5.5.7 7th Energy level
Chromium
12,060.00 kJ/mol
Rank: 15 (Overall)
114,300.00 kJ/mol
Rank: 1 (Overall)
Bohrium
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5.5.8 8th Energy Level
Chromium
14,580.00 kJ/mol
Rank: 14 (Overall)
125,300.00 kJ/mol
Rank: 1 (Overall)
Hassium
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5.5.9 9th Energy Level
Chromium
22,540.00 kJ/mol
Rank: 5 (Overall)
134,700.00 kJ/mol
Rank: 1 (Overall)
Yttrium
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5.5.10 10th Energy Level
Chromium
25,290.00 kJ/mol
Rank: 8 (Overall)
144,300.00 kJ/mol
Rank: 1 (Overall)
Strontium
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5.5.11 11th Energy Level
Magnesium
28,000.00 kJ/mol
Rank: 9 (Overall)
26,130.00 kJ/mol
Rank: 12 (Overall)
Yttrium
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5.5.12 12th Energy Level
Magnesium
31,920.00 kJ/mol
Rank: 9 (Overall)
28,750.00 kJ/mol
Rank: 13 (Overall)
Molybdenum
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5.5.13 13th Energy Level
Titanium
34,830.00 kJ/mol
Rank: 9 (Overall)
34,230.00 kJ/mol
Rank: 10 (Overall)
Molybdenum
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5.5.14 14th Energy Level
Vanadium
37,840.00 kJ/mol
Rank: 11 (Overall)
37,066.00 kJ/mol
Rank: 12 (Overall)
Molybdenum
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5.5.15 15th Energy Level
Chromium
44,100.00 kJ/mol
Rank: 11 (Overall)
97,510.00 kJ/mol
Rank: 1 (Overall)
Manganese
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5.5.16 16th Energy Level
Manganese
47,206.00 kJ/mol
Rank: 13 (Overall)
105,800.00 kJ/mol
Rank: 2 (Overall)
Iron
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5.5.17 17th Energy Level
Iron
122,200.00 kJ/mol
Rank: 1 (Overall)
114,300.00 kJ/mol
Rank: 3 (Overall)
Cobalt
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5.5.18 18th Energy Level
Cobalt
131,000.00 kJ/mol
Rank: 2 (Overall)
125,300.00 kJ/mol
Rank: 4 (Overall)
Nickel
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5.5.19 19th Energy Level
Nickel
140,500.00 kJ/mol
Rank: 3 (Overall)
134,700.00 kJ/mol
Rank: 5 (Overall)
Copper
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5.5.20 20th Energy Level
Zinc
152,600.00 kJ/mol
Rank: 5 (Overall)
144,300.00 kJ/mol
Rank: 7 (Overall)
Molybdenum
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5.5.21 21st Energy Level
Zinc
163,000.00 kJ/mol
Rank: 5 (Overall)
157,700.00 kJ/mol
Rank: 7 (Overall)
Molybdenum
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5.5.22 22nd Energy Level
Copper
173,600.00 kJ/mol
Rank: 4 (Overall)
166,090.00 kJ/mol
Rank: 6 (Overall)
Molybdenum
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5.5.23 23rd Energy Level
Copper
188,100.00 kJ/mol
Rank: 4 (Overall)
Not Available
Rank: 100 (Overall)
Molybdenum
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5.5.24 24th Energy Level
Iron
195,200.00 kJ/mol
Rank: 1 (Overall)
Not Available
Rank: 100 (Overall)
Molybdenum
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5.5.25 25th Energy Level
Molybdenum
Not Available
Rank: 100 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.26 26th Energy Level
Molybdenum
Not Available
Rank: 100 (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.27 27th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.28 28th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.29 29th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.30 30th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.6 Electrochemical Equivalent
Francium
0.69 g/amp-hr
Rank: 65 (Overall)
0.32 g/amp-hr
Rank: 73 (Overall)
Beryllium
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5.7 Electron Work Function
Platinum
4.70 eV
Rank: 10 (Overall)
4.50 eV
Rank: 14 (Overall)
Cesium
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5.8 Other Chemical Properties
Corrosion, Ionization, Solubility
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
Tennessine
26
Rank: 80 (Overall)
24
Rank: 82 (Overall)
Lithium
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6.2 Electron Configuration
[Ar] 3d6 4s2
[Ar] 3d5 4s1
6.3 Crystal Structure
Body Centered Cubic (BCC)
Body Centered Cubic (BCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine
26
Rank: 79 (Overall)
24
Rank: 81 (Overall)
Lithium
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6.4.2 Number of Neutrons
Flerovium
30
Rank: 60 (Overall)
28
Rank: 61 (Overall)
Lithium
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6.4.3 Number of Electrons
Tennessine
26
Rank: 79 (Overall)
24
Rank: 81 (Overall)
Lithium
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium
126.00 pm
Rank: 48 (Overall)
128.00 pm
Rank: 46 (Overall)
Beryllium
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6.5.2 Covalent Radius
Francium
132.00 pm
Rank: 48 (Overall)
139.00 pm
Rank: 45 (Overall)
Beryllium
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6.5.3 Van der Waals Radius
Francium
200.00 pm
Rank: 28 (Overall)
200.00 pm
Rank: 28 (Overall)
Zinc
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6.6 Atomic Weight
Tennessine
55.85 amu
Rank: 74 (Overall)
52.00 amu
Rank: 76 (Overall)
Lithium
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6.7 Atomic Volume
Cesium
7.10 cm3/mol
Rank: 61 (Overall)
7.23 cm3/mol
Rank: 60 (Overall)
Manganese
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6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
Platinum
67.00 (-eV)
Rank: 20 (Overall)
170.00 (-eV)
Rank: 4 (Overall)
Francium
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6.10 Lattice Constant
Manganese
286.65 pm
Rank: 63 (Overall)
291.00 pm
Rank: 62 (Overall)
Beryllium
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6.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
6.12 Lattice C/A Ratio
Cadmium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium
7.87 g/cm3
Rank: 52 (Overall)
7.19 g/cm3
Rank: 58 (Overall)
Lithium
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7.1.2 Density When Liquid (at m.p.)
Osmium
6.98 g/cm3
Rank: 35 (Overall)
6.30 g/cm3
Rank: 40 (Overall)
Lithium
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7.2 Tensile Strength
Iron
11,000.00 MPa
Rank: 1 (Overall)
689.00 MPa
Rank: 7 (Overall)
Indium
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7.3 Viscosity
Mercury
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
Strontium
0.00 (Pa)
Rank: 28 (Overall)
0.00 (Pa)
Rank: 24 (Overall)
Cerium
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7.4.2 Vapor Pressure at 2000 K
Chromium
36.80 (Pa)
Rank: 5 (Overall)
774.00 (Pa)
Rank: 1 (Overall)
Tungsten
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7.5 Elasticity properties
7.5.1 Shear Modulus
Osmium
82.00 GPa
Rank: 11 (Overall)
115.00 GPa
Rank: 9 (Overall)
Potassium
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7.5.2 Bulk Modulus
Osmium
170.00 GPa
Rank: 10 (Overall)
160.00 GPa
Rank: 11 (Overall)
Cesium
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7.5.3 Young's Modulus
Iridium
211.00 GPa
Rank: 9 (Overall)
279.00 GPa
Rank: 8 (Overall)
Cesium
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7.6 Poisson Ratio
Gallium
0.29
Rank: 15 (Overall)
0.21
Rank: 32 (Overall)
Beryllium
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7.7 Other Mechanical Properties
Ductile, Malleable, Weldable
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt
7.20
Rank: 45 (Overall)
7.19
Rank: 46 (Overall)
Lithium
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8.1.2 Magnetic Ordering
Ferromagnetic
Antiferromagnetic
8.1.3 Permeability
Iron
6.3 * 10-3 H/m
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.1.4 Susceptibility
Iron
2,00,000.00
Rank: 1 (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
NA
8.2.2 Resistivity
Mercury
96.10 nΩ·m
Rank: 32 (Overall)
125.00 nΩ·m
Rank: 27 (Overall)
Thallium
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8.2.3 Electrical Conductivity
Silver
0.10 106/cm Ω
Rank: 20 (Overall)
0.08 106/cm Ω
Rank: 25 (Overall)
Plutonium
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8.2.4 Electron Affinity
Gold
15.70 kJ/mol
Rank: 34 (Overall)
64.30 kJ/mol
Rank: 15 (Overall)
Mercury
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9 Thermal
9.1 Specific Heat
Lithium
0.44 J/(kg K)
Rank: 13 (Overall)
0.45 J/(kg K)
Rank: 12 (Overall)
Americium
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9.2 Molar Heat Capacity
Americium
25.10 J/mol·K
Rank: 43 (Overall)
23.35 J/mol·K
Rank: 55 (Overall)
Beryllium
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9.3 Thermal Conductivity
Silver
80.40 W/m·K
Rank: 22 (Overall)
93.90 W/m·K
Rank: 17 (Overall)
Neptunium
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9.4 Critical Temperature
Lithium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Ytterbium
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9.5 Thermal Expansion
Cesium
11.80 µm/(m·K)
Rank: 33 (Overall)
4.90 µm/(m·K)
Rank: 57 (Overall)
Tungsten
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten
351.00 kJ/mol
Rank: 23 (Overall)
348.80 kJ/mol
Rank: 24 (Overall)
Zinc
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9.6.2 Enthalpy of Fusion
Tungsten
14.90 kJ/mol
Rank: 22 (Overall)
15.31 kJ/mol
Rank: 20 (Overall)
Cesium
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9.6.3 Enthalpy of Atomization
Tungsten
414.20 kJ/mol
Rank: 19 (Overall)
397.50 kJ/mol
Rank: 21 (Overall)
Mercury
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9.7 Standard Molar Entropy
Protactinium
27.30 J/mol.K
Rank: 56 (Overall)
23.80 J/mol.K
Rank: 57 (Overall)
Beryllium
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