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Neptunium
Neptunium

Cadmium
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Neptunium
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Neptunium vs Cadmium

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1 Periodic Table
1.1 Symbol
Np
Cd
1.2 Group Number
Tennessine
Not Available
Rank: N/A (Overall)
12
Rank: 6 (Overall)
Gadolinium
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1.3 Period Number
Uranium
7
Rank: 1 (Overall)
5
Rank: 3 (Overall)
Lithium
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1.4 Block
f block
d block
1.5 Element Family
Actinide
Transition Metal
1.6 CAS Number
Roentgenium
7439998
Rank: 79 (Overall)
7440439
Rank: 42 (Overall)
Aluminium
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1.7 Space Group Name
Pnma
P63/mmc
1.8 Space Group Number
Sodium
62.00
Rank: 11 (Overall)
194.00
Rank: 5 (Overall)
Plutonium
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2 Facts
2.1 Interesting Facts
Not Available
  • Naturally occurring minor elements include Cadmium.
  • Cadmium is released into atmosphere to control volcanic eruption and forest fires.
  • It is used for electroplating of Steel for corrosion resistance.
  • It can absorb neutrons and used in nuclear reactor to control atomic fission.
2.2 Sources
Made by Bombarding Uranium with Neutrons, Ores of metals
Found As a By-product, Found in Minerals, Mining
2.3 History
2.3.1 Who Discovered
Edwin McMillan and Philip H. Abelson
Karl Samuel Leberecht Hermann and Friedrich Stromeyer
2.3.2 Discovery
In 1940
In 1817
2.4 Abundance
2.4.1 Abundance In Universe
Iron
Not Available
Rank: N/A (Overall)
2 * 10-7 %
Rank: 22 (Overall)
Thallium
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2.6.1 Abundance In Sun
Iron
~-9999 %
Rank: N/A (Overall)
~0.0000006 %
Rank: 21 (Overall)
Beryllium
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3.1.2 Abundance In Meteorites
Iron
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 31 (Overall)
Gold
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3.1.4 Abundance In Earth's Crust
Aluminium
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 46 (Overall)
Radium
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3.1.5 Abundance In Oceans
Sodium
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 28 (Overall)
Protactinium
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3.1.7 Abundance In Humans
Calcium
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 11 (Overall)
Radium
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4 Uses
4.1 Uses & Benefits
  • Currently known uses of Neptunium metal are limited to research purpose only.
  • Neptunium’s isotope neptunium-237 is used as a neutron detectors.
  • It has very limited uses as it is a toxic metal and it can cause birth defects, cancer, etc.
  • Almost 80% of Cadmium metal is used in Nickel cadmium Batteries and now it is getting replaced with nickel hydride.
4.1.1 Industrial Uses
NA
Aerospace Industry, Ammunition Industry, Chemical Industry, Electrical Industry, Electronic Industry
4.1.2 Medical Uses
NA
NA
4.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys
4.2 Biological Properties
4.2.1 Toxicity
Toxic
Toxic
4.2.2 Present in Human Body
7% Actinide Series Metals have it !
60% Transition Metals Metals have it !
4.2.3 In Blood
Sodium
0.00 Blood/mg dm-3
Rank: 37 (Overall)
0.01 Blood/mg dm-3
Rank: 24 (Overall)
Plutonium
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4.2.5 In Bone
Calcium
0.00 p.p.m.
Rank: 36 (Overall)
1.80 p.p.m.
Rank: 15 (Overall)
Plutonium
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5 Physical
5.1 Melting Point
Tungsten
640.00 °C
Rank: 62 (Overall)
320.90 °C
Rank: 68 (Overall)
Francium
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5.2 Boiling Point
Tungsten
3,902.00 °C
Rank: 13 (Overall)
765.00 °C
Rank: 73 (Overall)
Flerovium
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6.2 Appearance
6.2.1 Physical State
Solid
Solid
6.2.2 Color
Silver
Silvery Bluish-Gray
6.2.3 Luster
Metallic
Metallic
6.3 Hardness
6.3.1 Mohs Hardness
Chromium
Not Available
Rank: N/A (Overall)
2.00
Rank: 16 (Overall)
Cesium
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6.4.1 Brinell Hardness
Osmium
Not Available
Rank: N/A (Overall)
203.00 MPa
Rank: 39 (Overall)
Cesium
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6.4.2 Vickers Hardness
Tungsten
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Palladium
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6.6 Speed of Sound
Technetium
Not Available
Rank: N/A (Overall)
2,310.00 m/s
Rank: 39 (Overall)
Thallium
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6.8 Optical Properties
6.8.1 Refractive Index
Palladium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
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6.8.2 Reflectivity
Silver
Not Available
Rank: N/A (Overall)
67.00 %
Rank: 11 (Overall)
Molybdenum
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6.10 Allotropes
No Actinide Series Metals has it !
6% Transition Metals Metals have it !
6.10.1 α Allotropes
Not Available
Not Available
6.10.2 β Allotropes
Not Available
Not Available
6.10.3 γ Allotropes
Not Available
Not Available
7 Chemical
7.1 Chemical Formula
Np
Cd
7.2 Isotopes
7.2.1 Known Isotopes
Palladium
20
Rank: 19 (Overall)
34
Rank: 5 (Overall)
Tennessine
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7.4 Electronegativity
7.4.1 Pauling Electronegativity
Gold
1.36
Rank: 29 (Overall)
1.69
Rank: 17 (Overall)
Francium
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7.5.2 Sanderson Electronegativity
Cobalt
Not Available
Rank: N/A (Overall)
1.98
Rank: 9 (Overall)
Cesium
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7.5.3 Allred Rochow Electronegativity
Gallium
1.22
Rank: 26 (Overall)
1.46
Rank: 15 (Overall)
Cesium
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7.5.5 Mulliken-Jaffe Electronegativity
Polonium
Not Available
Rank: N/A (Overall)
1.53
Rank: 13 (Overall)
Cesium
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7.5.7 Allen Electronegativity
Berkelium
Not Available
Rank: N/A (Overall)
1.52
Rank: 27 (Overall)
Cesium
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7.6 Electropositivity
7.6.1 Pauling Electropositivity
Francium
2.64
Rank: 25 (Overall)
2.31
Rank: 37 (Overall)
Gold
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7.7 Ionization Energies
7.7.1 1st Energy Level
Chromium
604.50 kJ/mol
Rank: 50 (Overall)
867.80 kJ/mol
Rank: 11 (Overall)
Cesium
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7.7.2 2nd Energy Level
Chromium
1,128.00 kJ/mol
Rank: 72 (Overall)
1,631.40 kJ/mol
Rank: 32 (Overall)
Ruthenium
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7.7.3 3rd Energy Level
Chromium
1,997.00 kJ/mol
Rank: 74 (Overall)
3,616.00 kJ/mol
Rank: 13 (Overall)
Osmium
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7.7.4 4th Energy Level
Chromium
3,242.00 kJ/mol
Rank: 62 (Overall)
Not Available
Rank: N/A (Overall)
Thorium
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7.7.5 5th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Dubnium
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7.7.6 6th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium
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7.7.7 7th Energy level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bohrium
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7.7.8 8th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Hassium
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7.7.9 9th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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7.7.10 10th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Strontium
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7.7.11 11th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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7.7.12 12th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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7.7.13 13th Energy Level
Titanium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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7.7.14 14th Energy Level
Vanadium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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7.7.15 15th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Manganese
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7.7.16 16th Energy Level
Manganese
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Iron
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7.7.17 17th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cobalt
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7.7.18 18th Energy Level
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Nickel
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7.7.19 19th Energy Level
Nickel
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Copper
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7.7.20 20th Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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7.7.21 21st Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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7.7.22 22nd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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7.7.23 23rd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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1.2.1 24th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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1.2.2 25th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
1.3.1 26th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
1.3.2 27th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
1.3.3 28th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
1.6.1 29th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
1.6.2 30th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
1.9 Electrochemical Equivalent
Francium
1.77 g/amp-hr
Rank: 39 (Overall)
2.10 g/amp-hr
Rank: 27 (Overall)
Beryllium
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2.2 Electron Work Function
Platinum
Not Available
Rank: N/A (Overall)
4.22 eV
Rank: 22 (Overall)
Cesium
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2.6 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
3 Atomic
3.1 Atomic Number
Tennessine
93
Rank: 25 (Overall)
48
Rank: 64 (Overall)
Lithium
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3.2 Electron Configuration
[Rn] 5f4 6d1 7s2
[Kr] 4d10 5s2
3.3 Crystal Structure
Orthorhombic (ORTH)
Hexagonal Close Packed (HCP)
3.3.1 Crystal Lattice
3.4 Atom
3.4.1 Number of Protons
Tennessine
93
Rank: 25 (Overall)
48
Rank: 63 (Overall)
Lithium
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3.4.3 Number of Neutrons
Flerovium
144
Rank: 14 (Overall)
64
Rank: 46 (Overall)
Lithium
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3.4.4 Number of Electrons
Tennessine
93
Rank: 25 (Overall)
48
Rank: 63 (Overall)
Lithium
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3.5 Radius of an Atom
3.5.1 Atomic Radius
Cesium
155.00 pm
Rank: 30 (Overall)
151.00 pm
Rank: 32 (Overall)
Beryllium
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3.5.3 Covalent Radius
Francium
190.00 pm
Rank: 18 (Overall)
144.00 pm
Rank: 40 (Overall)
Beryllium
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3.5.5 Van der Waals Radius
Francium
221.00 pm
Rank: 22 (Overall)
158.00 pm
Rank: 41 (Overall)
Zinc
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4.3 Atomic Weight
Tennessine
237.00 amu
Rank: 22 (Overall)
112.41 amu
Rank: 58 (Overall)
Lithium
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4.4 Atomic Volume
Cesium
11.62 cm3/mol
Rank: 43 (Overall)
13.10 cm3/mol
Rank: 39 (Overall)
Manganese
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4.5 Adjacent Atomic Numbers
4.5.1 Previous Element
4.5.2 Next Element
4.6 Valence Electron Potential
Platinum
96.00 (-eV)
Rank: 9 (Overall)
30.00 (-eV)
Rank: 52 (Overall)
Francium
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5.2 Lattice Constant
Manganese
666.30 pm
Rank: 3 (Overall)
297.94 pm
Rank: 60 (Overall)
Beryllium
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5.4 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
5.5 Lattice C/A Ratio
Cadmium
Not Available
Rank: N/A (Overall)
1.89
Rank: 1 (Overall)
Beryllium
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6 Mechanical
6.1 Density
6.1.1 Density At Room Temperature
Hassium
19.38 g/cm3
Rank: 14 (Overall)
8.65 g/cm3
Rank: 47 (Overall)
Lithium
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6.3.2 Density When Liquid (at m.p.)
Osmium
Not Available
Rank: N/A (Overall)
8.00 g/cm3
Rank: 28 (Overall)
Lithium
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6.4 Tensile Strength
Iron
125.00 MPa
Rank: 14 (Overall)
62.00 MPa
Rank: 16 (Overall)
Indium
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6.5 Viscosity
Mercury
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
6.6 Vapor Pressure
6.6.1 Vapor Pressure at 1000 K
Strontium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cerium
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6.7.1 Vapor Pressure at 2000 K
Chromium
0.11 (Pa)
Rank: 17 (Overall)
Not Available
Rank: N/A (Overall)
Tungsten
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6.9 Elasticity properties
6.9.1 Shear Modulus
Osmium
Not Available
Rank: N/A (Overall)
19.00 GPa
Rank: 35 (Overall)
Potassium
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6.9.3 Bulk Modulus
Osmium
Not Available
Rank: N/A (Overall)
42.00 GPa
Rank: 29 (Overall)
Cesium
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6.10.1 Young's Modulus
Iridium
Not Available
Rank: N/A (Overall)
50.00 GPa
Rank: 36 (Overall)
Cesium
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7.3 Poisson Ratio
Gallium
Not Available
Rank: N/A (Overall)
0.30
Rank: 14 (Overall)
Beryllium
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7.5 Other Mechanical Properties
Ductile
Ductile, Malleable
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt
20.25
Rank: 6 (Overall)
8.65
Rank: 36 (Overall)
Lithium
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8.1.3 Magnetic Ordering
Paramagnetic
Diamagnetic
8.1.4 Permeability
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.1.5 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
Semiconductor
8.2.2 Resistivity
Mercury
1.22 nΩ·m
Rank: 59 (Overall)
72.70 nΩ·m
Rank: 36 (Overall)
Thallium
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8.2.4 Electrical Conductivity
Silver
0.01 106/cm Ω
Rank: 61 (Overall)
0.14 106/cm Ω
Rank: 15 (Overall)
Plutonium
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8.2.6 Electron Affinity
Gold
Not Available
Rank: N/A (Overall)
0.00 kJ/mol
Rank: 40 (Overall)
Mercury
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9 Thermal
9.1 Specific Heat
Lithium
0.12 J/(kg K)
Rank: 40 (Overall)
0.23 J/(kg K)
Rank: 26 (Overall)
Americium
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9.2 Molar Heat Capacity
Americium
29.46 J/mol·K
Rank: 8 (Overall)
26.02 J/mol·K
Rank: 32 (Overall)
Beryllium
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9.4 Thermal Conductivity
Silver
6.30 W/m·K
Rank: 70 (Overall)
96.60 W/m·K
Rank: 16 (Overall)
Neptunium
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9.5 Critical Temperature
Lithium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Ytterbium
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9.6 Thermal Expansion
Cesium
Not Available
Rank: N/A (Overall)
30.80 µm/(m·K)
Rank: 10 (Overall)
Tungsten
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9.7 Enthalpy
9.7.1 Enthalpy of Vaporization
Tungsten
Not Available
Rank: N/A (Overall)
100.00 kJ/mol
Rank: 53 (Overall)
Zinc
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9.7.3 Enthalpy of Fusion
Tungsten
3.20 kJ/mol
Rank: 56 (Overall)
6.19 kJ/mol
Rank: 50 (Overall)
Cesium
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9.7.4 Enthalpy of Atomization
Tungsten
Not Available
Rank: N/A (Overall)
113.00 kJ/mol
Rank: 56 (Overall)
Mercury
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9.8 Standard Molar Entropy
Protactinium
Not Available
Rank: N/A (Overall)
51.80 J/mol.K
Rank: 27 (Overall)
Beryllium
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