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Radium
Radium

Polonium
Polonium



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Radium
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Polonium

Radium vs Polonium

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1 Periodic Table
1.1 Symbol
Ra
Po
1.2 Group Number
Tennessine
2
Rank: 16 (Overall)
16
Rank: 2 (Overall)
Gadolinium
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1.4 Period Number
Uranium
7
Rank: 1 (Overall)
6
Rank: 2 (Overall)
Lithium
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1.5 Block
s block
p block
1.6 Element Family
Alkaline Earth
Post-​Transition
1.7 CAS Number
Roentgenium
7440144
Rank: 65 (Overall)
7440086
Rank: 71 (Overall)
Aluminium
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1.8 Space Group Name
Im_ 3m
Pm-3m
1.9 Space Group Number
Sodium
229.00
Rank: 1 (Overall)
221.00
Rank: 3 (Overall)
Plutonium
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2 Facts
2.1 Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  • Polonium was the first radioactive element to be discovered.
  • Polonium element and its compounds are highly radioactive.
  • Its alloy with Beryllium provides source of neutrons.
2.2 Sources
Mining, Ores of metals
Mining, Ores of metals
2.3 History
2.3.1 Who Discovered
Not Available
Pierre Curie and Marie Curie
2.3.2 Discovery
In 1898
In 1898
2.4 Abundance
2.4.1 Abundance In Universe
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Thallium
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3.2.2 Abundance In Sun
Iron
~-9999 %
Rank: N/A (Overall)
~-9999 %
Rank: N/A (Overall)
Beryllium
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3.3.2 Abundance In Meteorites
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Gold
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3.3.3 Abundance In Earth's Crust
Aluminium
0.00 %
Rank: 57 (Overall)
Not Available
Rank: N/A (Overall)
Radium
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3.3.5 Abundance In Oceans
Sodium
0.00 %
Rank: 45 (Overall)
0.00 %
Rank: 46 (Overall)
Protactinium
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3.3.7 Abundance In Humans
Calcium
0.00 %
Rank: 20 (Overall)
Not Available
Rank: N/A (Overall)
Radium
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4 Uses
4.1 Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  • Polonium metal has different Allotropes, it is used in antistatic devices and for research purpose.
  • A 1 gram of Polonium can reach a temperature of 500°C, hence it is used as a heat source for space equipment.
4.1.1 Industrial Uses
NA
Aerospace Industry, Ammunition Industry
4.1.2 Medical Uses
Pharmaceutical Industry
NA
4.1.3 Other Uses
NA
Alloys
4.2 Biological Properties
4.2.1 Toxicity
Highly Toxic
Highly Toxic
4.2.2 Present in Human Body
83% Alkaline Earth Metals Metals have it !
70% Post Transition Metals Metals have it !
4.2.3 In Blood
Sodium
Not Available
Rank: N/A (Overall)
0.00 Blood/mg dm-3
Rank: 37 (Overall)
Plutonium
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4.2.5 In Bone
Calcium
Not Available
Rank: N/A (Overall)
0.00 p.p.m.
Rank: 36 (Overall)
Plutonium
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5 Physical
5.1 Melting Point
Tungsten
700.00 °C
Rank: 59 (Overall)
254.00 °C
Rank: 71 (Overall)
Francium
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5.3 Boiling Point
Tungsten
1,737.00 °C
Rank: 54 (Overall)
962.00 °C
Rank: 69 (Overall)
Flerovium
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5.4 Appearance
5.4.1 Physical State
Solid
Solid
5.4.2 Color
Silvery White
Silver
5.4.3 Luster
Metallic
NA
5.5 Hardness
5.5.1 Mohs Hardness
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.5.2 Brinell Hardness
Osmium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.5.4 Vickers Hardness
Tungsten
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Palladium
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5.7 Speed of Sound
Technetium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Thallium
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5.9 Optical Properties
5.9.1 Refractive Index
Palladium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
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6.1.2 Reflectivity
Silver
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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6.2 Allotropes
No Alkaline Earth Metals Metals has it !
20% Post Transition Metals Metals have it !
6.2.2 α Allotropes
Not Available
α-polonium
6.2.3 β Allotropes
Not Available
β-polonium
6.2.4 γ Allotropes
Not Available
Not Available
7 Chemical
7.1 Chemical Formula
Ra
Po
7.2 Isotopes
7.2.1 Known Isotopes
Palladium
33
Rank: 6 (Overall)
29
Rank: 10 (Overall)
Tennessine
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7.3 Electronegativity
7.3.1 Pauling Electronegativity
Gold
0.90
Rank: 49 (Overall)
2.00
Rank: 7 (Overall)
Francium
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7.4.2 Sanderson Electronegativity
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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7.4.4 Allred Rochow Electronegativity
Gallium
0.97
Rank: 38 (Overall)
1.76
Rank: 2 (Overall)
Cesium
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7.5.1 Mulliken-Jaffe Electronegativity
Polonium
0.92
Rank: 20 (Overall)
2.48
Rank: 1 (Overall)
Cesium
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7.5.2 Allen Electronegativity
Berkelium
0.89
Rank: 42 (Overall)
2.19
Rank: 2 (Overall)
Cesium
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7.8 Electropositivity
7.8.1 Pauling Electropositivity
Francium
3.10
Rank: 5 (Overall)
2.00
Rank: 46 (Overall)
Gold
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7.9 Ionization Energies
7.9.1 1st Energy Level
Chromium
509.30 kJ/mol
Rank: 82 (Overall)
812.10 kJ/mol
Rank: 14 (Overall)
Cesium
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7.9.3 2nd Energy Level
Chromium
979.00 kJ/mol
Rank: 81 (Overall)
Not Available
Rank: N/A (Overall)
Ruthenium
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7.9.5 3rd Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Osmium
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7.10.1 4th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Thorium
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7.10.2 5th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Dubnium
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8.2.1 6th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium
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8.3.1 7th Energy level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bohrium
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8.3.2 8th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Hassium
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9.1.1 9th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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9.2.1 10th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Strontium
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9.3.1 11th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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9.3.2 12th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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9.5.1 13th Energy Level
Titanium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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9.6.2 14th Energy Level
Vanadium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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9.6.4 15th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Manganese
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9.6.6 16th Energy Level
Manganese
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Iron
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9.6.7 17th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cobalt
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9.8.2 18th Energy Level
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Nickel
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9.8.4 19th Energy Level
Nickel
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Copper
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9.8.6 20th Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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9.8.7 21st Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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9.9.1 22nd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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9.11.1 23rd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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10.1.2 24th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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10.1.4 25th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
10.1.5 26th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
10.1.7 27th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
10.1.8 28th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
10.2.2 29th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
10.2.3 30th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
10.3 Electrochemical Equivalent
Francium
4.22 g/amp-hr
Rank: 6 (Overall)
3.90 g/amp-hr
Rank: 8 (Overall)
Beryllium
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10.4 Electron Work Function
Platinum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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10.5 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Solubility
11 Atomic
11.1 Atomic Number
Tennessine
88
Rank: 30 (Overall)
84
Rank: 32 (Overall)
Lithium
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12.2 Electron Configuration
[Rn] 7s2
[Xe] 4f14 5d10 6s2 6p4
12.3 Crystal Structure
Body Centered Cubic (BCC)
Monoclinic (MON)
12.3.1 Crystal Lattice
12.4 Atom
12.4.1 Number of Protons
Tennessine
88
Rank: 30 (Overall)
84
Rank: 32 (Overall)
Lithium
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12.4.2 Number of Neutrons
Flerovium
138
Rank: 16 (Overall)
125
Rank: 19 (Overall)
Lithium
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12.5.1 Number of Electrons
Tennessine
88
Rank: 30 (Overall)
84
Rank: 32 (Overall)
Lithium
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12.7 Radius of an Atom
12.7.1 Atomic Radius
Cesium
Not Available
Rank: N/A (Overall)
168.00 pm
Rank: 23 (Overall)
Beryllium
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12.8.1 Covalent Radius
Francium
221.00 pm
Rank: 3 (Overall)
140.00 pm
Rank: 44 (Overall)
Beryllium
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12.9.1 Van der Waals Radius
Francium
283.00 pm
Rank: 4 (Overall)
197.00 pm
Rank: 29 (Overall)
Zinc
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12.10 Atomic Weight
Tennessine
226.00 amu
Rank: 26 (Overall)
209.00 amu
Rank: 28 (Overall)
Lithium
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12.12 Atomic Volume
Cesium
45.20 cm3/mol
Rank: 4 (Overall)
22.23 cm3/mol
Rank: 13 (Overall)
Manganese
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12.14 Adjacent Atomic Numbers
12.14.1 Previous Element
12.14.2 Next Element
12.15 Valence Electron Potential
Platinum
20.10 (-eV)
Rank: 59 (Overall)
Not Available
Rank: 100 (Overall)
Francium
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12.16 Lattice Constant
Manganese
514.80 pm
Rank: 13 (Overall)
335.90 pm
Rank: 48 (Overall)
Beryllium
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12.17 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
12.18 Lattice C/A Ratio
Cadmium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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13 Mechanical
13.1 Density
13.1.1 Density At Room Temperature
Hassium
5.50 g/cm3
Rank: 68 (Overall)
9.20 g/cm3
Rank: 41 (Overall)
Lithium
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13.1.2 Density When Liquid (at m.p.)
Osmium
Not Available
Rank: N/A (Overall)
9.40 g/cm3
Rank: 19 (Overall)
Lithium
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13.2 Tensile Strength
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Indium
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13.3 Viscosity
Mercury
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
13.4 Vapor Pressure
13.4.1 Vapor Pressure at 1000 K
Strontium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cerium
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13.4.2 Vapor Pressure at 2000 K
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Tungsten
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13.5 Elasticity properties
13.5.1 Shear Modulus
Osmium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Potassium
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13.5.2 Bulk Modulus
Osmium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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13.5.3 Young's Modulus
Iridium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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13.6 Poisson Ratio
Gallium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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13.7 Other Mechanical Properties
NA
NA
14 Magnetic
14.1 Magnetic Characteristics
14.1.1 Specific Gravity
Cobalt
5.00
Rank: 56 (Overall)
9.32
Rank: 31 (Overall)
Lithium
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14.1.2 Magnetic Ordering
Nonmagnetic
Nonmagnetic
14.1.3 Permeability
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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14.1.4 Susceptibility
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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14.2 Electrical Properties
14.2.1 Electrical Property
NA
Conductor
14.2.2 Resistivity
Mercury
100.00 nΩ·m
Rank: 31 (Overall)
0.40 nΩ·m
Rank: 67 (Overall)
Thallium
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14.2.3 Electrical Conductivity
Silver
Not Available
Rank: N/A (Overall)
0.02 106/cm Ω
Rank: 44 (Overall)
Plutonium
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14.2.4 Electron Affinity
Gold
Not Available
Rank: N/A (Overall)
183.30 kJ/mol
Rank: 3 (Overall)
Mercury
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15 Thermal
15.1 Specific Heat
Lithium
0.12 J/(kg K)
Rank: 40 (Overall)
0.12 J/(kg K)
Rank: 40 (Overall)
Americium
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15.2 Molar Heat Capacity
Americium
Not Available
Rank: N/A (Overall)
26.40 J/mol·K
Rank: 28 (Overall)
Beryllium
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15.3 Thermal Conductivity
Silver
18.60 W/m·K
Rank: 45 (Overall)
20.00 W/m·K
Rank: 44 (Overall)
Neptunium
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15.4 Critical Temperature
Lithium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Ytterbium
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15.5 Thermal Expansion
Cesium
Not Available
Rank: N/A (Overall)
23.50 µm/(m·K)
Rank: 16 (Overall)
Tungsten
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15.6 Enthalpy
15.6.1 Enthalpy of Vaporization
Tungsten
Not Available
Rank: N/A (Overall)
60.30 kJ/mol
Rank: 58 (Overall)
Zinc
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15.6.2 Enthalpy of Fusion
Tungsten
Not Available
Rank: N/A (Overall)
13.00 kJ/mol
Rank: 26 (Overall)
Cesium
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15.6.3 Enthalpy of Atomization
Tungsten
163.00 kJ/mol
Rank: 51 (Overall)
134.00 kJ/mol
Rank: 54 (Overall)
Mercury
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15.7 Standard Molar Entropy
Protactinium
71.00 J/mol.K
Rank: 14 (Overall)
Not Available
Rank: N/A (Overall)
Beryllium
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