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Erbium
Erbium

Promethium
Promethium



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Erbium
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Erbium vs Promethium

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1 Periodic Table
1.1 Symbol
Er
Pm
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
7440520
Rank: 35 (Overall)
7440122
Rank: 67 (Overall)
Aluminium
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1.7 Space Group Name
P63/mmc
Not Available
1.8 Space Group Number
Sodium
194.00
Rank: 5 (Overall)
Not Available
Rank: N/A (Overall)
Plutonium
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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.
  • Promethium metal found in Pitchblende.
  • Promethium metal is highly radioactive metal.
2.2 Sources
Mining
Found in Minerals, Mining
2.3 History
2.3.1 Who Discovered
Carl Gustaf Mosander
Chien Shiung Wu, Emilio Segrè, Hans Bethe
2.3.2 Discovery
In 1842
In 1942
2.4 Abundance
2.4.1 Abundance In Universe
Iron
2 * 10-7 %
Rank: 22 (Overall)
Not Available
Rank: N/A (Overall)
Thallium
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2.4.2 Abundance In Sun
Iron
~0.0000001 %
Rank: 26 (Overall)
~-9999 %
Rank: N/A (Overall)
Beryllium
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2.4.3 Abundance In Meteorites
Iron
0.00 %
Rank: 36 (Overall)
Not Available
Rank: N/A (Overall)
Gold
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2.4.4 Abundance In Earth's Crust
Aluminium
0.00 %
Rank: 32 (Overall)
Not Available
Rank: N/A (Overall)
Radium
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2.4.5 Abundance In Oceans
Sodium
0.00 %
Rank: 36 (Overall)
Not Available
Rank: N/A (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
  • 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.
  • It is used for research purpose. Very small amount of this metal is used in atomic batteries.
  • Its radioactive decay is used for a phosphor to give off light. The light emitted is converted into electricity.
3.1.1 Industrial Uses
Chemical Industry
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys
NA
3.2 Biological Properties
3.2.1 Toxicity
Mildly Toxic
Non Toxic
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)
0.00 Blood/mg dm-3
Rank: 37 (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
1,522.00 °C
Rank: 28 (Overall)
1,042.00 °C
Rank: 43 (Overall)
Francium
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4.2 Boiling Point
Tungsten
2,510.00 °C
Rank: 44 (Overall)
3,000.00 °C
Rank: 31 (Overall)
Flerovium
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Unknown
4.3.3 Luster
Lustrous
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
814.00 MPa
Rank: 11 (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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4.4.3 Vickers Hardness
Tungsten
589.00 MPa
Rank: 19 (Overall)
Not Available
Rank: N/A (Overall)
Palladium
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4.5 Speed of Sound
Technetium
2,830.00 m/s
Rank: 28 (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
Er
Pm
5.2 Isotopes
5.2.1 Known Isotopes
Palladium
31
Rank: 8 (Overall)
27
Rank: 12 (Overall)
Tennessine
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold
1.24
Rank: 36 (Overall)
Not Available
Rank: N/A (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
1.11
Rank: 29 (Overall)
1.07
Rank: 32 (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
2.76
Rank: 18 (Overall)
Not Available
Rank: N/A (Overall)
Gold
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium
589.30 kJ/mol
Rank: 59 (Overall)
540.00 kJ/mol
Rank: 73 (Overall)
Cesium
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5.5.2 2nd Energy Level
Chromium
1,150.00 kJ/mol
Rank: 68 (Overall)
1,050.00 kJ/mol
Rank: 78 (Overall)
Ruthenium
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5.5.3 3rd Energy Level
Chromium
2,194.00 kJ/mol
Rank: 65 (Overall)
2,150.00 kJ/mol
Rank: 67 (Overall)
Osmium
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5.5.4 4th Energy Level
Chromium
4,120.00 kJ/mol
Rank: 33 (Overall)
3,970.00 kJ/mol
Rank: 38 (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
2.08 g/amp-hr
Rank: 28 (Overall)
1.80 g/amp-hr
Rank: 36 (Overall)
Beryllium
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5.7 Electron Work Function
Platinum
Not Available
Rank: N/A (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
68
Rank: 48 (Overall)
61
Rank: 55 (Overall)
Lithium
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6.2 Electron Configuration
[Xe] 4f12 6s2
[Xe] 4f5 6s2
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
Double Hexagonal Close Packed (DHCP)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine
68
Rank: 47 (Overall)
61
Rank: 54 (Overall)
Lithium
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6.4.2 Number of Neutrons
Flerovium
99
Rank: 33 (Overall)
84
Rank: 40 (Overall)
Lithium
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6.4.3 Number of Electrons
Tennessine
68
Rank: 47 (Overall)
61
Rank: 54 (Overall)
Lithium
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium
176.00 pm
Rank: 18 (Overall)
183.00 pm
Rank: 10 (Overall)
Beryllium
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6.5.2 Covalent Radius
Francium
189.00 pm
Rank: 19 (Overall)
199.00 pm
Rank: 12 (Overall)
Beryllium
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6.5.3 Van der Waals Radius
Francium
Not Available
Rank: N/A (Overall)
236.00 pm
Rank: 16 (Overall)
Zinc
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6.6 Atomic Weight
Tennessine
167.26 amu
Rank: 43 (Overall)
145.00 amu
Rank: 49 (Overall)
Lithium
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6.7 Atomic Volume
Cesium
18.40 cm3/mol
Rank: 25 (Overall)
22.39 cm3/mol
Rank: 12 (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
49.00 (-eV)
Rank: 29 (Overall)
44.10 (-eV)
Rank: 39 (Overall)
Francium
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6.10 Lattice Constant
Manganese
355.88 pm
Rank: 39 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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6.11 Lattice Angles
π/2, π/2, 2 π/3
Unknown
6.12 Lattice C/A Ratio
Cadmium
1.57
Rank: 17 (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
9.07 g/cm3
Rank: 42 (Overall)
7.26 g/cm3
Rank: 56 (Overall)
Lithium
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7.1.2 Density When Liquid (at m.p.)
Osmium
8.86 g/cm3
Rank: 23 (Overall)
Not Available
Rank: N/A (Overall)
Lithium
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7.2 Tensile Strength
Iron
Not Available
Rank: N/A (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: 20 (Overall)
Not Available
Rank: N/A (Overall)
Cerium
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7.4.2 Vapor Pressure at 2000 K
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Tungsten
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7.5 Elasticity properties
7.5.1 Shear Modulus
Osmium
28.30 GPa
Rank: 25 (Overall)
18.00 GPa
Rank: 36 (Overall)
Potassium
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7.5.2 Bulk Modulus
Osmium
44.40 GPa
Rank: 27 (Overall)
33.00 GPa
Rank: 36 (Overall)
Cesium
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7.5.3 Young's Modulus
Iridium
69.90 GPa
Rank: 29 (Overall)
46.00 GPa
Rank: 38 (Overall)
Cesium
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7.6 Poisson Ratio
Gallium
0.24
Rank: 28 (Overall)
0.28
Rank: 17 (Overall)
Beryllium
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7.7 Other Mechanical Properties
Malleable
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt
9.07
Rank: 32 (Overall)
7.26
Rank: 43 (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
0.86 nΩ·m
Rank: 63 (Overall)
0.75 nΩ·m
Rank: 64 (Overall)
Thallium
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8.2.3 Electrical Conductivity
Silver
0.01 106/cm Ω
Rank: 53 (Overall)
Not Available
Rank: N/A (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
0.17 J/(kg K)
Rank: 34 (Overall)
0.18 J/(kg K)
Rank: 33 (Overall)
Americium
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9.2 Molar Heat Capacity
Americium
28.12 J/mol·K
Rank: 11 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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9.3 Thermal Conductivity
Silver
14.50 W/m·K
Rank: 55 (Overall)
17.90 W/m·K
Rank: 47 (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
12.20 µm/(m·K)
Rank: 31 (Overall)
9.00 µm/(m·K)
Rank: 43 (Overall)
Tungsten
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten
261.00 kJ/mol
Rank: 35 (Overall)
Not Available
Rank: N/A (Overall)
Zinc
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9.6.2 Enthalpy of Fusion
Tungsten
17.20 kJ/mol
Rank: 15 (Overall)
7.50 kJ/mol
Rank: 43 (Overall)
Cesium
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9.6.3 Enthalpy of Atomization
Tungsten
314.00 kJ/mol
Rank: 33 (Overall)
310.00 kJ/mol
Rank: 34 (Overall)
Mercury
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9.7 Standard Molar Entropy
Protactinium
73.10 J/mol.K
Rank: 11 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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