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Terbium
Terbium

Thulium
Thulium



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Terbium
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Thulium

Terbium vs Thulium

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1 Periodic Table
1.1 Symbol
Tb
Tm
1.2 Group Number
Tennessine
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Gadolinium
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1.3 Period Number
Uranium
6
Rank: 2 (Overall)
6
Rank: 2 (Overall)
Lithium
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1.4 Block
f block
f block
1.5 Element Family
Lanthanide
Lanthanide
1.6 CAS Number
Roentgenium
7440279
Rank: 53 (Overall)
7440304
Rank: 51 (Overall)
Aluminium
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1.7 Space Group Name
P63/mmc
P63/mmc
1.8 Space Group Number
Sodium
194.00
Rank: 5 (Overall)
194.00
Rank: 5 (Overall)
Plutonium
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2 Facts
2.1 Interesting Facts
  • At times Terbium metal acts same as Calcium.
  • Terbium metal closely similar to Lanthanum metal.
  • Thulium metal can resist corrosion due to dry air .
  • Only Tm-169 isotope of Thulium metal occur naturally.
2.2 Sources
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Carl Gustaf Mosander
Per Teodor Cleve
2.3.2 Discovery
In 1842
In 1879
2.4 Abundance
2.4.1 Abundance In Universe
Iron
5 * 10-8 %
Rank: 27 (Overall)
1 * 10-8 %
Rank: 30 (Overall)
Thallium
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2.4.2 Abundance In Sun
Iron
~0.00000001 %
Rank: 29 (Overall)
~0.00000002 %
Rank: 28 (Overall)
Beryllium
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2.4.3 Abundance In Meteorites
Iron
0.00 %
Rank: 46 (Overall)
0.00 %
Rank: 47 (Overall)
Gold
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2.4.4 Abundance In Earth's Crust
Aluminium
0.00 %
Rank: 40 (Overall)
0.00 %
Rank: 43 (Overall)
Radium
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2.4.5 Abundance In Oceans
Sodium
0.00 %
Rank: 43 (Overall)
0.00 %
Rank: 41 (Overall)
Protactinium
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2.4.6 Abundance In Humans
Calcium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Radium
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3 Uses
3.1 Uses & Benefits
  • Terbium salts are used in optical devices like laser devices.
  • Terbium’s alloy lengthens and shortens the magnetic field and this effect forms loudspeaker.
  • Thulium metal produces isotopes that emits X-rays. This isotope is used in X-ray machine.
  • Thulium element is also used in Surgical equipment like laser.
3.1.1 Industrial Uses
Electronic Industry
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys
Alloys, Nuclear Research, Research Purposes
3.2 Biological Properties
3.2.1 Toxicity
Low Toxic
Unknown
3.2.2 Present in Human Body
27% Lanthanide Series Metals have it !
27% Lanthanide Series Metals have it !
3.2.3 In Blood
Sodium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Plutonium
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3.2.4 In Bone
Calcium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Plutonium
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4 Physical
4.1 Melting Point
Tungsten
1,356.00 °C
Rank: 33 (Overall)
1,545.00 °C
Rank: 23 (Overall)
Francium
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4.2 Boiling Point
Tungsten
3,123.00 °C
Rank: 29 (Overall)
1,730.00 °C
Rank: 55 (Overall)
Flerovium
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Silvery Gray
4.3.3 Luster
Metallic
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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4.4.2 Brinell Hardness
Osmium
677.00 MPa
Rank: 17 (Overall)
471.00 MPa
Rank: 25 (Overall)
Cesium
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4.4.3 Vickers Hardness
Tungsten
863.00 MPa
Rank: 13 (Overall)
520.00 MPa
Rank: 21 (Overall)
Palladium
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4.5 Speed of Sound
Technetium
2,620.00 m/s
Rank: 35 (Overall)
Not Available
Rank: N/A (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
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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4.7 Allotropes
No Lanthanide Series Metals has it !
No Lanthanide Series Metals has 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
Tb
Tm
5.2 Isotopes
5.2.1 Known Isotopes
Palladium
26
Rank: 13 (Overall)
32
Rank: 7 (Overall)
Tennessine
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold
Not Available
Rank: N/A (Overall)
1.25
Rank: 35 (Overall)
Francium
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5.3.2 Sanderson Electronegativity
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.3.3 Allred Rochow Electronegativity
Gallium
1.10
Rank: 30 (Overall)
1.11
Rank: 29 (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
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium
Not Available
Rank: N/A (Overall)
2.75
Rank: 19 (Overall)
Gold
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium
603.40 kJ/mol
Rank: 51 (Overall)
596.70 kJ/mol
Rank: 55 (Overall)
Cesium
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5.5.2 2nd Energy Level
Chromium
1,174.80 kJ/mol
Rank: 64 (Overall)
1,160.00 kJ/mol
Rank: 66 (Overall)
Ruthenium
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5.5.3 3rd Energy Level
Chromium
2,417.00 kJ/mol
Rank: 49 (Overall)
2,285.00 kJ/mol
Rank: 57 (Overall)
Osmium
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5.5.4 4th Energy Level
Chromium
4,203.00 kJ/mol
Rank: 31 (Overall)
4,120.00 kJ/mol
Rank: 33 (Overall)
Thorium
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5.5.5 5th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Dubnium
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5.5.6 6th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium
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5.5.7 7th Energy level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bohrium
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5.5.8 8th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Hassium
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5.5.9 9th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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5.5.10 10th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Strontium
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5.5.11 11th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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5.5.12 12th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.13 13th Energy Level
Titanium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.14 14th Energy Level
Vanadium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.15 15th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Manganese
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5.5.16 16th Energy Level
Manganese
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Iron
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5.5.17 17th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cobalt
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5.5.18 18th Energy Level
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Nickel
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5.5.19 19th Energy Level
Nickel
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Copper
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5.5.20 20th Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.21 21st Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.22 22nd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.23 23rd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.24 24th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.25 25th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.26 26th Energy Level
Molybdenum
Not Available
Rank: N/A (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
1.98 g/amp-hr
Rank: 31 (Overall)
2.10 g/amp-hr
Rank: 26 (Overall)
Beryllium
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5.7 Electron Work Function
Platinum
3.00 eV
Rank: 36 (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
Tennessine
65
Rank: 51 (Overall)
69
Rank: 47 (Overall)
Lithium
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6.2 Electron Configuration
[Xe] 4f9 6s2
[Xe] 4f13 6s2
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
65
Rank: 50 (Overall)
69
Rank: 46 (Overall)
Lithium
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6.4.2 Number of Neutrons
Flerovium
94
Rank: 36 (Overall)
100
Rank: 32 (Overall)
Lithium
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6.4.3 Number of Electrons
Tennessine
65
Rank: 50 (Overall)
69
Rank: 46 (Overall)
Lithium
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium
177.00 pm
Rank: 17 (Overall)
176.00 pm
Rank: 18 (Overall)
Beryllium
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6.5.2 Covalent Radius
Francium
194.00 pm
Rank: 16 (Overall)
160.00 pm
Rank: 30 (Overall)
Beryllium
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6.5.3 Van der Waals Radius
Francium
221.00 pm
Rank: 22 (Overall)
Not Available
Rank: N/A (Overall)
Zinc
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6.6 Atomic Weight
Tennessine
158.93 amu
Rank: 46 (Overall)
168.93 amu
Rank: 42 (Overall)
Lithium
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6.7 Atomic Volume
Cesium
19.20 cm3/mol
Rank: 22 (Overall)
18.10 cm3/mol
Rank: 28 (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
46.80 (-eV)
Rank: 33 (Overall)
49.70 (-eV)
Rank: 28 (Overall)
Francium
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6.10 Lattice Constant
Manganese
360.10 pm
Rank: 36 (Overall)
353.75 pm
Rank: 40 (Overall)
Beryllium
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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
1.58
Rank: 13 (Overall)
1.57
Rank: 17 (Overall)
Beryllium
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7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium
8.23 g/cm3
Rank: 50 (Overall)
9.32 g/cm3
Rank: 40 (Overall)
Lithium
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7.1.2 Density When Liquid (at m.p.)
Osmium
7.65 g/cm3
Rank: 30 (Overall)
8.56 g/cm3
Rank: 24 (Overall)
Lithium
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7.2 Tensile Strength
Iron
60.00 MPa
Rank: 17 (Overall)
Not Available
Rank: N/A (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: 29 (Overall)
0.06 (Pa)
Rank: 10 (Overall)
Cerium
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7.4.2 Vapor Pressure at 2000 K
Chromium
12.50 (Pa)
Rank: 8 (Overall)
Not Available
Rank: N/A (Overall)
Tungsten
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7.5 Elasticity properties
7.5.1 Shear Modulus
Osmium
22.10 GPa
Rank: 32 (Overall)
30.50 GPa
Rank: 22 (Overall)
Potassium
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7.5.2 Bulk Modulus
Osmium
38.70 GPa
Rank: 33 (Overall)
44.50 GPa
Rank: 26 (Overall)
Cesium
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7.5.3 Young's Modulus
Iridium
55.70 GPa
Rank: 34 (Overall)
74.00 GPa
Rank: 27 (Overall)
Cesium
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7.6 Poisson Ratio
Gallium
0.26
Rank: 21 (Overall)
0.21
Rank: 31 (Overall)
Beryllium
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7.7 Other Mechanical Properties
Ductile, Malleable
Ductile, Malleable
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt
8.23
Rank: 39 (Overall)
9.32
Rank: 31 (Overall)
Lithium
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8.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
8.1.3 Permeability
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.1.4 Susceptibility
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
Conductor
8.2.2 Resistivity
Mercury
1.15 nΩ·m
Rank: 60 (Overall)
676.00 nΩ·m
Rank: 5 (Overall)
Thallium
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8.2.3 Electrical Conductivity
Silver
0.01 106/cm Ω
Rank: 59 (Overall)
0.02 106/cm Ω
Rank: 49 (Overall)
Plutonium
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8.2.4 Electron Affinity
Gold
50.00 kJ/mol
Rank: 21 (Overall)
50.00 kJ/mol
Rank: 21 (Overall)
Mercury
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9 Thermal
9.1 Specific Heat
Lithium
0.18 J/(kg K)
Rank: 33 (Overall)
0.16 J/(kg K)
Rank: 35 (Overall)
Americium
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9.2 Molar Heat Capacity
Americium
28.91 J/mol·K
Rank: 9 (Overall)
27.03 J/mol·K
Rank: 22 (Overall)
Beryllium
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9.3 Thermal Conductivity
Silver
11.10 W/m·K
Rank: 62 (Overall)
16.90 W/m·K
Rank: 49 (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
10.30 µm/(m·K)
Rank: 38 (Overall)
13.30 µm/(m·K)
Rank: 29 (Overall)
Tungsten
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten
330.90 kJ/mol
Rank: 26 (Overall)
191.00 kJ/mol
Rank: 42 (Overall)
Zinc
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9.6.2 Enthalpy of Fusion
Tungsten
10.80 kJ/mol
Rank: 34 (Overall)
16.80 kJ/mol
Rank: 17 (Overall)
Cesium
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9.6.3 Enthalpy of Atomization
Tungsten
314.00 kJ/mol
Rank: 33 (Overall)
247.00 kJ/mol
Rank: 41 (Overall)
Mercury
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9.7 Standard Molar Entropy
Protactinium
73.20 J/mol.K
Rank: 10 (Overall)
74.00 J/mol.K
Rank: 9 (Overall)
Beryllium
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