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Erbium
Erbium

Thallium
Thallium



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Erbium
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Thallium

Erbium Thallium Comparison

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1 Periodic Table
1.1 Symbol
Er
Tl
1.2 Group Number
Tennessine Metal
Not Available
Rank: N/A (Overall)
13
Rank: 5 (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
f block
p block
1.5 Element Family
Lanthanide
Post-​Transition
1.6 CAS Number
Roentgenium Met..
7440520
Rank: 35 (Overall)
7440280
Rank: 52 (Overall)
Aluminium Metal
1.7 Space Group Name
P63/mmc
P63/mmc
1.8 Space Group Number
Sodium Metal
194.00
Rank: 5 (Overall)
194.00
Rank: 5 (Overall)
Plutonium Metal
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2 Facts
2.1 Interesting Facts
  • Erbium metal is used as alloyed with Vanadium to make it softer.
  • Recent studies shows that it is helpful for metabolism.
  • Compounds of Thallium metal are highly Toxic.
  • Thallium metal is being suspected as a human carcinogen.
2.2 Sources
Mining
Found As a By-product, Ores of metals, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Carl Gustaf Mosander
William Crookes
2.3.2 Discovery
In 1842
In 1861
2.4 Abundance
2.4.1 Abundance In Universe
Iron Metal
2 * 10-7 %
Rank: 22 (Overall)
5 * 10-9 %
Rank: 32 (Overall)
Thallium Metal
2.4.2 Abundance In Sun
Iron Metal
~0.0000001 %
Rank: 26 (Overall)
~0.0000001 %
Rank: 26 (Overall)
Beryllium Metal
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2.4.3 Abundance In Meteorites
Iron Metal
0.00 %
Rank: 36 (Overall)
0.00 %
Rank: 41 (Overall)
Gold Metal
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2.4.4 Abundance In Earth's Crust
Aluminium Metal
0.00 %
Rank: 32 (Overall)
0.00 %
Rank: 42 (Overall)
Radium Metal
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2.4.5 Abundance In Oceans
Sodium Metal
0.00 %
Rank: 36 (Overall)
0.00 %
Rank: 34 (Overall)
Protactinium Metal
2.4.6 Abundance In Humans
Calcium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Radium Metal
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3 Uses
3.1 Uses & Benefits
  • It has a tendency to get tarnished in the open air, but when alloyed with elements like erbium, vanadium, its hardness levels decreases.
  • Its compounds like Erbium oxide is used in safety glasses of welders and metal workers.
  • 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.
3.1.1 Industrial Uses
Chemical Industry
Chemical Industry
3.1.2 Medical Uses
NA
Medical Research
3.1.3 Other Uses
Alloys
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Mildly Toxic
Highly Toxic
3.2.2 Present in Human Body
27% Lanthanide Series Metals have it !
70% Post Transition Metals Metals have it !
3.2.3 In Blood
Sodium Metal
Not Available
Rank: N/A (Overall)
0.00 Blood/mg dm-3
Rank: 34 (Overall)
Plutonium Metal
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3.2.4 In Bone
Calcium Metal
Not Available
Rank: N/A (Overall)
0.00 p.p.m.
Rank: 33 (Overall)
Plutonium Metal
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4 Physical
4.1 Melting Point
Tungsten Metal
1,522.00 °C
Rank: 28 (Overall)
303.50 °C
Rank: 69 (Overall)
Francium Metal
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4.2 Boiling Point
Tungsten Metal
2,510.00 °C
Rank: 44 (Overall)
1,457.00 °C
Rank: 60 (Overall)
Flerovium Metal
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Silvery White
4.3.3 Luster
Lustrous
NA
4.4 Hardness
4.4.1 Mohs Hardness
Chromium Metal
Not Available
Rank: N/A (Overall)
1.20
Rank: 20 (Overall)
Cesium Metal
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4.4.2 Brinell Hardness
Osmium Metal
814.00 MPa
Rank: 11 (Overall)
26.50 MPa
Rank: 50 (Overall)
Cesium Metal
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4.4.3 Vickers Hardness
Tungsten Metal
589.00 MPa
Rank: 19 (Overall)
Not Available
Rank: N/A (Overall)
Palladium Metal
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4.5 Speed of Sound
Technetium Metal
2,830.00 m/s
Rank: 28 (Overall)
818.00 m/s
Rank: 53 (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
No Lanthanide Series Metals has 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
Er
Tl
5.2 Isotopes
5.2.1 Known Isotopes
Palladium Metal
31
Rank: 8 (Overall)
32
Rank: 7 (Overall)
Tennessine Metal
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold Metal
1.24
Rank: 36 (Overall)
1.62
Rank: 21 (Overall)
Francium Metal
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5.3.2 Sanderson Electronegativity
Cobalt Metal
Not Available
Rank: N/A (Overall)
2.25
Rank: 5 (Overall)
Cesium Metal
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5.3.3 Allred Rochow Electronegativity
Gallium Metal
1.11
Rank: 29 (Overall)
1.44
Rank: 17 (Overall)
Cesium Metal
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5.3.4 Mulliken-Jaffe Electronegativity
Polonium Metal
Not Available
Rank: N/A (Overall)
1.96
Rank: 6 (Overall)
Cesium Metal
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5.3.5 Allen Electronegativity
Berkelium Metal
Not Available
Rank: N/A (Overall)
1.79
Rank: 13 (Overall)
Cesium Metal
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium Metal
2.76
Rank: 18 (Overall)
2.38
Rank: 33 (Overall)
Gold Metal
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium Metal
589.30 kJ/mol
Rank: 59 (Overall)
589.40 kJ/mol
Rank: 58 (Overall)
Cesium Metal
5.5.2 2nd Energy Level
Chromium Metal
1,150.00 kJ/mol
Rank: 68 (Overall)
1,971.00 kJ/mol
Rank: 14 (Overall)
Ruthenium Metal
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5.5.3 3rd Energy Level
Chromium Metal
2,194.00 kJ/mol
Rank: 65 (Overall)
2,878.00 kJ/mol
Rank: 32 (Overall)
Osmium Metal
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5.5.4 4th Energy Level
Chromium Metal
4,120.00 kJ/mol
Rank: 33 (Overall)
Not Available
Rank: N/A (Overall)
Thorium Metal
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5.5.5 5th Energy Level
Chromium Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (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
2.08 g/amp-hr
Rank: 28 (Overall)
7.63 g/amp-hr
Rank: 2 (Overall)
Beryllium Metal
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5.7 Electron Work Function
Platinum Metal
Not Available
Rank: N/A (Overall)
3.84 eV
Rank: 28 (Overall)
Cesium Metal
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5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Corrosion, Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
Tennessine Metal
68
Rank: 48 (Overall)
81
Rank: 35 (Overall)
Lithium Metal
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6.2 Electron Configuration
[Xe] 4f12 6s2
[Xe] 4f14 5d10 6s2 6p1
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine Metal
68
Rank: 47 (Overall)
81
Rank: 35 (Overall)
Lithium Metal
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6.4.2 Number of Neutrons
Flerovium Metal
99
Rank: 33 (Overall)
123
Rank: 20 (Overall)
Lithium Metal
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6.4.3 Number of Electrons
Tennessine Metal
68
Rank: 47 (Overall)
81
Rank: 35 (Overall)
Lithium Metal
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium Metal
176.00 pm
Rank: 18 (Overall)
170.00 pm
Rank: 22 (Overall)
Beryllium Metal
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6.5.2 Covalent Radius
Francium Metal
189.00 pm
Rank: 19 (Overall)
145.00 pm
Rank: 39 (Overall)
Beryllium Metal
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6.5.3 Van der Waals Radius
Francium Metal
Not Available
Rank: N/A (Overall)
196.00 pm
Rank: 30 (Overall)
Zinc Metal
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6.6 Atomic Weight
Tennessine Metal
167.26 amu
Rank: 43 (Overall)
204.38 amu
Rank: 31 (Overall)
Lithium Metal
6.7 Atomic Volume
Cesium Metal
18.40 cm3/mol
Rank: 25 (Overall)
17.20 cm3/mol
Rank: 31 (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
49.00 (-eV)
Rank: 29 (Overall)
9.60 (-eV)
Rank: 64 (Overall)
Francium Metal
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6.10 Lattice Constant
Manganese Metal
355.88 pm
Rank: 39 (Overall)
345.66 pm
Rank: 45 (Overall)
Beryllium Metal
6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
6.12 Lattice C/A Ratio
Cadmium Metal
1.57
Rank: 17 (Overall)
1.60
Rank: 6 (Overall)
Beryllium Metal
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium Metal
9.07 g/cm3
Rank: 42 (Overall)
11.85 g/cm3
Rank: 31 (Overall)
Lithium Metal
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7.1.2 Density When Liquid (at m.p.)
Osmium Metal
8.86 g/cm3
Rank: 23 (Overall)
11.22 g/cm3
Rank: 13 (Overall)
Lithium Metal
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7.2 Tensile Strength
Iron Metal
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (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
0.00 (Pa)
Rank: 20 (Overall)
16.90 (Pa)
Rank: 5 (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
28.30 GPa
Rank: 25 (Overall)
2.80 GPa
Rank: 51 (Overall)
Potassium Metal
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7.5.2 Bulk Modulus
Osmium Metal
44.40 GPa
Rank: 27 (Overall)
43.00 GPa
Rank: 28 (Overall)
Cesium Metal
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7.5.3 Young's Modulus
Iridium Metal
69.90 GPa
Rank: 29 (Overall)
8.00 GPa
Rank: 54 (Overall)
Cesium Metal
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7.6 Poisson Ratio
Gallium Metal
0.24
Rank: 28 (Overall)
0.45
Rank: 2 (Overall)
Beryllium Metal
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7.7 Other Mechanical Properties
Malleable
Ductile, Sectile
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt Metal
9.07
Rank: 32 (Overall)
11.85
Rank: 22 (Overall)
Lithium Metal
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8.1.2 Magnetic Ordering
Paramagnetic
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
Conductor
8.2.2 Resistivity
Mercury Metal
0.86 nΩ·m
Rank: 63 (Overall)
0.18 nΩ·m
Rank: 70 (Overall)
Thallium Metal
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8.2.3 Electrical Conductivity
Silver Metal
0.01 106/cm Ω
Rank: 53 (Overall)
0.06 106/cm Ω
Rank: 32 (Overall)
Plutonium Metal
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8.2.4 Electron Affinity
Gold Metal
50.00 kJ/mol
Rank: 21 (Overall)
19.20 kJ/mol
Rank: 32 (Overall)
Mercury Metal
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9 Thermal
9.1 Specific Heat
Lithium Metal
0.17 J/(kg K)
Rank: 34 (Overall)
0.13 J/(kg K)
Rank: 39 (Overall)
Americium Metal
9.2 Molar Heat Capacity
Americium Metal
28.12 J/mol·K
Rank: 11 (Overall)
26.32 J/mol·K
Rank: 29 (Overall)
Beryllium Metal
9.3 Thermal Conductivity
Silver Metal
14.50 W/m·K
Rank: 55 (Overall)
46.10 W/m·K
Rank: 33 (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
12.20 µm/(m·K)
Rank: 31 (Overall)
29.90 µm/(m·K)
Rank: 12 (Overall)
Tungsten Metal
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten Metal
261.00 kJ/mol
Rank: 35 (Overall)
162.10 kJ/mol
Rank: 45 (Overall)
Zinc Metal
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9.6.2 Enthalpy of Fusion
Tungsten Metal
17.20 kJ/mol
Rank: 15 (Overall)
4.27 kJ/mol
Rank: 54 (Overall)
Cesium Metal
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9.6.3 Enthalpy of Atomization
Tungsten Metal
314.00 kJ/mol
Rank: 33 (Overall)
179.90 kJ/mol
Rank: 48 (Overall)
Mercury Metal
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9.7 Standard Molar Entropy
Protactinium Me..
73.10 J/mol.K
Rank: 11 (Overall)
64.20 J/mol.K
Rank: 19 (Overall)
Beryllium Metal
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