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Thallium
Thallium

Lead
Lead



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Thallium
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Lead

Thallium Lead Comparison

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1 Periodic Table
1.1 Symbol
Tl
Pb
1.2 Group Number
Tennessine Metal
13
Rank: 5 (Overall)
14
Rank: 4 (Overall)
Gadolinium Metal
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1.3 Period Number
Uranium Metal
6
Rank: 2 (Overall)
6
Rank: 2 (Overall)
Lithium Metal
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1.4 Block
p block
p block
1.5 Element Family
Post-​Transition
Post-​Transition
1.6 CAS Number
Roentgenium Met..
7440280
Rank: 52 (Overall)
7439921
Rank: 86 (Overall)
Aluminium Metal
1.7 Space Group Name
P63/mmc
Fm_ 3m
1.8 Space Group Number
Sodium Metal
194.00
Rank: 5 (Overall)
225.00
Rank: 2 (Overall)
Plutonium Metal
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2 Facts
2.1 Interesting Facts
  • Compounds of Thallium metal are highly Toxic.
  • Thallium metal is being suspected as a human carcinogen.
  • Galena mineral contains almost 87% of Lead metal in it, Galena is sulfide mineral.
  • The best available source of Lead metal today is by recycling automobile batteries.
2.2 Sources
Found As a By-product, Ores of metals, Ores of Minerals
Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals
2.3 History
2.3.1 Who Discovered
William Crookes
Unknown
2.3.2 Discovery
In 1861
In Middle Easterns (7000 BCE)
2.4 Abundance
2.4.1 Abundance In Universe
Iron Metal
5 * 10-9 %
Rank: 32 (Overall)
1 * 10-6 %
Rank: 16 (Overall)
Thallium Metal
2.4.2 Abundance In Sun
Iron Metal
~0.0000001 %
Rank: 26 (Overall)
~0.000001 %
Rank: 18 (Overall)
Beryllium Metal
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2.4.3 Abundance In Meteorites
Iron Metal
0.00 %
Rank: 41 (Overall)
0.00 %
Rank: 23 (Overall)
Gold Metal
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2.4.4 Abundance In Earth's Crust
Aluminium Metal
0.00 %
Rank: 42 (Overall)
0.00 %
Rank: 26 (Overall)
Radium Metal
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2.4.5 Abundance In Oceans
Sodium Metal
0.00 %
Rank: 34 (Overall)
0.00 %
Rank: 22 (Overall)
Protactinium Metal
2.4.6 Abundance In Humans
Calcium Metal
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 8 (Overall)
Radium Metal
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3 Uses
3.1 Uses & Benefits
  • Thallium is a toxic metal and hence it has limited uses. Thallium metal is mostly used for producing photoelectric cells.
  • In thermometer’s mercury alloy has 8% of thallium, as it has a melting point lower than 20°C.
  • It is also used in insecticides, hair dyes and as an anti-knocking additive for petrol. But all these are banned by the government as Lead metal is known for detrimental to health.
3.1.1 Industrial Uses
Chemical Industry
Chemical Industry, Electrical Industry, Electronic Industry
3.1.2 Medical Uses
Medical Research
Surgical Instruments Manufacturing
3.1.3 Other Uses
Alloys
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Highly Toxic
Toxic
3.2.2 Present in Human Body
70% Post Transition Metals Metals have it !
70% Post Transition Metals Metals have it !
3.2.3 In Blood
Sodium Metal
0.00 Blood/mg dm-3
Rank: 34 (Overall)
0.21 Blood/mg dm-3
Rank: 11 (Overall)
Plutonium Metal
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3.2.4 In Bone
Calcium Metal
0.00 p.p.m.
Rank: 33 (Overall)
30.00 p.p.m.
Rank: 10 (Overall)
Plutonium Metal
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4 Physical
4.1 Melting Point
Tungsten Metal
303.50 °C
Rank: 69 (Overall)
327.50 °C
Rank: 67 (Overall)
Francium Metal
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4.2 Boiling Point
Tungsten Metal
1,457.00 °C
Rank: 60 (Overall)
1,740.00 °C
Rank: 53 (Overall)
Flerovium Metal
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Gray
4.3.3 Luster
NA
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
Chromium Metal
1.20
Rank: 20 (Overall)
1.50
Rank: 18 (Overall)
Cesium Metal
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4.4.2 Brinell Hardness
Osmium Metal
26.50 MPa
Rank: 50 (Overall)
38.00 MPa
Rank: 49 (Overall)
Cesium Metal
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4.4.3 Vickers Hardness
Tungsten Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Palladium Metal
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4.5 Speed of Sound
Technetium Metal
818.00 m/s
Rank: 53 (Overall)
1,190.00 m/s
Rank: 52 (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
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
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4.7 Allotropes
20% Post Transition Metals Metals have it !
20% Post 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
Tl
Pb
5.2 Isotopes
5.2.1 Known Isotopes
Palladium Metal
32
Rank: 7 (Overall)
35
Rank: 4 (Overall)
Tennessine Metal
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold Metal
1.62
Rank: 21 (Overall)
1.87
Rank: 13 (Overall)
Francium Metal
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5.3.2 Sanderson Electronegativity
Cobalt Metal
2.25
Rank: 5 (Overall)
2.29
Rank: 4 (Overall)
Cesium Metal
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5.3.3 Allred Rochow Electronegativity
Gallium Metal
1.44
Rank: 17 (Overall)
1.55
Rank: 11 (Overall)
Cesium Metal
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5.3.4 Mulliken-Jaffe Electronegativity
Polonium Metal
1.96
Rank: 6 (Overall)
2.41
Rank: 2 (Overall)
Cesium Metal
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5.3.5 Allen Electronegativity
Berkelium Metal
1.79
Rank: 13 (Overall)
1.85
Rank: 8 (Overall)
Cesium Metal
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium Metal
2.38
Rank: 33 (Overall)
1.67
Rank: 51 (Overall)
Gold Metal
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium Metal
589.40 kJ/mol
Rank: 58 (Overall)
715.60 kJ/mol
Rank: 31 (Overall)
Cesium Metal
5.5.2 2nd Energy Level
Chromium Metal
1,971.00 kJ/mol
Rank: 14 (Overall)
1,450.50 kJ/mol
Rank: 43 (Overall)
Ruthenium Metal
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5.5.3 3rd Energy Level
Chromium Metal
2,878.00 kJ/mol
Rank: 32 (Overall)
3,081.50 kJ/mol
Rank: 23 (Overall)
Osmium Metal
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5.5.4 4th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
4,083.00 kJ/mol
Rank: 35 (Overall)
Thorium Metal
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5.5.5 5th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
6,640.00 kJ/mol
Rank: 20 (Overall)
Dubnium Metal
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5.5.6 6th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium Metal
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5.5.7 7th Energy level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bohrium Metal
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5.5.8 8th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Hassium Metal
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5.5.9 9th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium Metal
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5.5.10 10th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Strontium Metal
5.5.11 11th Energy Level
Magnesium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium Metal
5.5.12 12th Energy Level
Magnesium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.13 13th Energy Level
Titanium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.14 14th Energy Level
Vanadium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.15 15th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Manganese Metal
5.5.16 16th Energy Level
Manganese Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Iron Metal
5.5.17 17th Energy Level
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cobalt Metal
5.5.18 18th Energy Level
Cobalt Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Nickel Metal
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5.5.19 19th Energy Level
Nickel Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Copper Metal
5.5.20 20th Energy Level
Zinc Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.21 21st Energy Level
Zinc Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.22 22nd Energy Level
Copper Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.23 23rd Energy Level
Copper Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.24 24th Energy Level
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
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5.5.25 25th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.26 26th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.27 27th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.28 28th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.29 29th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.5.30 30th Energy Level
Molybdenum Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum Metal
5.6 Electrochemical Equivalent
Francium Metal
7.63 g/amp-hr
Rank: 2 (Overall)
3.87 g/amp-hr
Rank: 9 (Overall)
Beryllium Metal
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5.7 Electron Work Function
Platinum Metal
3.84 eV
Rank: 28 (Overall)
4.25 eV
Rank: 21 (Overall)
Cesium Metal
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5.8 Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes
6 Atomic
6.1 Atomic Number
Tennessine Metal
81
Rank: 35 (Overall)
82
Rank: 34 (Overall)
Lithium Metal
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6.2 Electron Configuration
[Xe] 4f14 5d10 6s2 6p1
[Xe] 4f14 5d10 6s2 6p2
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine Metal
81
Rank: 35 (Overall)
82
Rank: 34 (Overall)
Lithium Metal
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6.4.2 Number of Neutrons
Flerovium Metal
123
Rank: 20 (Overall)
125
Rank: 19 (Overall)
Lithium Metal
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6.4.3 Number of Electrons
Tennessine Metal
81
Rank: 35 (Overall)
82
Rank: 34 (Overall)
Lithium Metal
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium Metal
170.00 pm
Rank: 22 (Overall)
175.00 pm
Rank: 19 (Overall)
Beryllium Metal
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6.5.2 Covalent Radius
Francium Metal
145.00 pm
Rank: 39 (Overall)
146.00 pm
Rank: 38 (Overall)
Beryllium Metal
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6.5.3 Van der Waals Radius
Francium Metal
196.00 pm
Rank: 30 (Overall)
202.00 pm
Rank: 27 (Overall)
Zinc Metal
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6.6 Atomic Weight
Tennessine Metal
204.38 amu
Rank: 31 (Overall)
207.20 amu
Rank: 30 (Overall)
Lithium Metal
6.7 Atomic Volume
Cesium Metal
17.20 cm3/mol
Rank: 31 (Overall)
18.17 cm3/mol
Rank: 27 (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
9.60 (-eV)
Rank: 64 (Overall)
24.20 (-eV)
Rank: 57 (Overall)
Francium Metal
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6.10 Lattice Constant
Manganese Metal
345.66 pm
Rank: 45 (Overall)
495.08 pm
Rank: 16 (Overall)
Beryllium Metal
6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
6.12 Lattice C/A Ratio
Cadmium Metal
1.60
Rank: 6 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium Metal
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium Metal
11.85 g/cm3
Rank: 31 (Overall)
11.34 g/cm3
Rank: 33 (Overall)
Lithium Metal
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7.1.2 Density When Liquid (at m.p.)
Osmium Metal
11.22 g/cm3
Rank: 13 (Overall)
10.66 g/cm3
Rank: 15 (Overall)
Lithium Metal
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7.2 Tensile Strength
Iron Metal
Not Available
Rank: N/A (Overall)
12.00 MPa
Rank: 20 (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
16.90 (Pa)
Rank: 5 (Overall)
1.64 (Pa)
Rank: 7 (Overall)
Cerium Metal
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7.4.2 Vapor Pressure at 2000 K
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Tungsten Metal
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7.5 Elasticity properties
7.5.1 Shear Modulus
Osmium Metal
2.80 GPa
Rank: 51 (Overall)
5.60 GPa
Rank: 47 (Overall)
Potassium Metal
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7.5.2 Bulk Modulus
Osmium Metal
43.00 GPa
Rank: 28 (Overall)
46.00 GPa
Rank: 24 (Overall)
Cesium Metal
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7.5.3 Young's Modulus
Iridium Metal
8.00 GPa
Rank: 54 (Overall)
16.00 GPa
Rank: 48 (Overall)
Cesium Metal
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7.6 Poisson Ratio
Gallium Metal
0.45
Rank: 2 (Overall)
0.44
Rank: 3 (Overall)
Beryllium Metal
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7.7 Other Mechanical Properties
Ductile, Sectile
Ductile, Malleable
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt Metal
11.85
Rank: 22 (Overall)
11.35
Rank: 25 (Overall)
Lithium Metal
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8.1.2 Magnetic Ordering
Diamagnetic
Diamagnetic
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
Conductor
Poor Conductor
8.2.2 Resistivity
Mercury Metal
0.18 nΩ·m
Rank: 70 (Overall)
208.00 nΩ·m
Rank: 16 (Overall)
Thallium Metal
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8.2.3 Electrical Conductivity
Silver Metal
0.06 106/cm Ω
Rank: 32 (Overall)
0.05 106/cm Ω
Rank: 36 (Overall)
Plutonium Metal
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8.2.4 Electron Affinity
Gold Metal
19.20 kJ/mol
Rank: 32 (Overall)
35.10 kJ/mol
Rank: 28 (Overall)
Mercury Metal
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9 Thermal
9.1 Specific Heat
Lithium Metal
0.13 J/(kg K)
Rank: 39 (Overall)
0.13 J/(kg K)
Rank: 39 (Overall)
Americium Metal
9.2 Molar Heat Capacity
Americium Metal
26.32 J/mol·K
Rank: 29 (Overall)
26.65 J/mol·K
Rank: 26 (Overall)
Beryllium Metal
9.3 Thermal Conductivity
Silver Metal
46.10 W/m·K
Rank: 33 (Overall)
35.30 W/m·K
Rank: 38 (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
29.90 µm/(m·K)
Rank: 12 (Overall)
28.90 µm/(m·K)
Rank: 13 (Overall)
Tungsten Metal
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten Metal
162.10 kJ/mol
Rank: 45 (Overall)
179.40 kJ/mol
Rank: 43 (Overall)
Zinc Metal
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9.6.2 Enthalpy of Fusion
Tungsten Metal
4.27 kJ/mol
Rank: 54 (Overall)
4.77 kJ/mol
Rank: 53 (Overall)
Cesium Metal
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9.6.3 Enthalpy of Atomization
Tungsten Metal
179.90 kJ/mol
Rank: 48 (Overall)
194.60 kJ/mol
Rank: 45 (Overall)
Mercury Metal
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9.7 Standard Molar Entropy
Protactinium Me..
64.20 J/mol.K
Rank: 19 (Overall)
64.80 J/mol.K
Rank: 17 (Overall)
Beryllium Metal
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