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Francium
Francium

Thallium
Thallium



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Francium
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Thallium

Francium vs Thallium

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1 Periodic Table
1.1 Symbol
Fr
Tl
1.2 Group Number
Tennessine
1
Rank: 17 (Overall)
13
Rank: 5 (Overall)
Gadolinium
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1.3 Period Number
Uranium
7
Rank: 1 (Overall)
6
Rank: 2 (Overall)
Lithium
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1.4 Block
s block
p block
1.5 Element Family
Alkali
Post-​Transition
1.6 CAS Number
Roentgenium
7440735
Rank: 18 (Overall)
7440280
Rank: 52 (Overall)
Aluminium
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1.7 Space Group Name
Not Available
P63/mmc
1.8 Space Group Number
Sodium
Not Available
Rank: N/A (Overall)
194.00
Rank: 5 (Overall)
Plutonium
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2 Facts
2.1 Interesting Facts
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  • Compounds of Thallium metal are highly Toxic.
  • Thallium metal is being suspected as a human carcinogen.
2.2 Sources
Formed by Decay Process, Mining
Found As a By-product, Ores of metals, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Marguerite Perey
William Crookes
2.3.2 Discovery
In 1939
In 1861
2.4 Abundance
2.4.1 Abundance In Universe
Iron
Not Available
Rank: N/A (Overall)
5 * 10-9 %
Rank: 32 (Overall)
Thallium
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2.4.2 Abundance In Sun
Iron
~-9999 %
Rank: N/A (Overall)
~0.0000001 %
Rank: 26 (Overall)
Beryllium
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2.4.3 Abundance In Meteorites
Iron
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 41 (Overall)
Gold
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2.4.4 Abundance In Earth's Crust
Aluminium
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 42 (Overall)
Radium
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2.4.5 Abundance In Oceans
Sodium
Not Available
Rank: N/A (Overall)
0.00 %
Rank: 34 (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
  • Francium has no known uses as it has a half life of only 22 minutes.
  • 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
NA
Chemical Industry
3.1.2 Medical Uses
NA
Medical Research
3.1.3 Other Uses
NA
Alloys
3.2 Biological Properties
3.2.1 Toxicity
NA
Highly Toxic
3.2.2 Present in Human Body
83% Alkali Metals Metals have it !
70% Post Transition Metals Metals have it !
3.2.3 In Blood
Sodium
0.00 Blood/mg dm-3
Rank: 37 (Overall)
0.00 Blood/mg dm-3
Rank: 34 (Overall)
Plutonium
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3.2.4 In Bone
Calcium
0.00 p.p.m.
Rank: 36 (Overall)
0.00 p.p.m.
Rank: 33 (Overall)
Plutonium
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4 Physical
4.1 Melting Point
Tungsten
27.00 °C
Rank: 81 (Overall)
303.50 °C
Rank: 69 (Overall)
Francium
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4.2 Boiling Point
Tungsten
677.00 °C
Rank: 76 (Overall)
1,457.00 °C
Rank: 60 (Overall)
Flerovium
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
NA
Silvery White
4.3.3 Luster
NA
NA
4.4 Hardness
4.4.1 Mohs Hardness
Chromium
Not Available
Rank: N/A (Overall)
1.20
Rank: 20 (Overall)
Cesium
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4.4.2 Brinell Hardness
Osmium
Not Available
Rank: N/A (Overall)
26.50 MPa
Rank: 50 (Overall)
Cesium
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4.4.3 Vickers Hardness
Tungsten
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Palladium
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4.5 Speed of Sound
Technetium
Not Available
Rank: N/A (Overall)
818.00 m/s
Rank: 53 (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 Alkali Metals 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
Fr
Tl
5.2 Isotopes
5.2.1 Known Isotopes
Palladium
33
Rank: 6 (Overall)
32
Rank: 7 (Overall)
Tennessine
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold
0.70
Rank: 53 (Overall)
1.62
Rank: 21 (Overall)
Francium
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5.3.2 Sanderson Electronegativity
Cobalt
Not Available
Rank: N/A (Overall)
2.25
Rank: 5 (Overall)
Cesium
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5.3.3 Allred Rochow Electronegativity
Gallium
0.86
Rank: 41 (Overall)
1.44
Rank: 17 (Overall)
Cesium
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5.3.4 Mulliken-Jaffe Electronegativity
Polonium
0.68
Rank: 25 (Overall)
1.96
Rank: 6 (Overall)
Cesium
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5.3.5 Allen Electronegativity
Berkelium
0.67
Rank: 47 (Overall)
1.79
Rank: 13 (Overall)
Cesium
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium
3.30
Rank: 1 (Overall)
2.38
Rank: 33 (Overall)
Gold
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium
380.00 kJ/mol
Rank: 89 (Overall)
589.40 kJ/mol
Rank: 58 (Overall)
Cesium
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5.5.2 2nd Energy Level
Chromium
Not Available
Rank: N/A (Overall)
1,971.00 kJ/mol
Rank: 14 (Overall)
Ruthenium
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5.5.3 3rd Energy Level
Chromium
Not Available
Rank: N/A (Overall)
2,878.00 kJ/mol
Rank: 32 (Overall)
Osmium
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5.5.4 4th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (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
8.32 g/amp-hr
Rank: 1 (Overall)
7.63 g/amp-hr
Rank: 2 (Overall)
Beryllium
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5.7 Electron Work Function
Platinum
Not Available
Rank: N/A (Overall)
3.84 eV
Rank: 28 (Overall)
Cesium
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5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Corrosion, Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
Tennessine
87
Rank: 31 (Overall)
81
Rank: 35 (Overall)
Lithium
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6.2 Electron Configuration
[Rn] 7s1
[Xe] 4f14 5d10 6s2 6p1
6.3 Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine
87
Rank: 31 (Overall)
81
Rank: 35 (Overall)
Lithium
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6.4.2 Number of Neutrons
Flerovium
136
Rank: 17 (Overall)
123
Rank: 20 (Overall)
Lithium
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6.4.3 Number of Electrons
Tennessine
87
Rank: 31 (Overall)
81
Rank: 35 (Overall)
Lithium
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium
Not Available
Rank: N/A (Overall)
170.00 pm
Rank: 22 (Overall)
Beryllium
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6.5.2 Covalent Radius
Francium
260.00 pm
Rank: 1 (Overall)
145.00 pm
Rank: 39 (Overall)
Beryllium
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6.5.3 Van der Waals Radius
Francium
348.00 pm
Rank: 1 (Overall)
196.00 pm
Rank: 30 (Overall)
Zinc
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6.6 Atomic Weight
Tennessine
223.00 amu
Rank: 27 (Overall)
204.38 amu
Rank: 31 (Overall)
Lithium
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6.7 Atomic Volume
Cesium
Not Available
Rank: N/A (Overall)
17.20 cm3/mol
Rank: 31 (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
8.00 (-eV)
Rank: 67 (Overall)
9.60 (-eV)
Rank: 64 (Overall)
Francium
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6.10 Lattice Constant
Manganese
Not Available
Rank: N/A (Overall)
345.66 pm
Rank: 45 (Overall)
Beryllium
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6.11 Lattice Angles
NA
π/2, π/2, 2 π/3
6.12 Lattice C/A Ratio
Cadmium
Not Available
Rank: N/A (Overall)
1.60
Rank: 6 (Overall)
Beryllium
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7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium
1.87 g/cm3
Rank: 77 (Overall)
11.85 g/cm3
Rank: 31 (Overall)
Lithium
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7.1.2 Density When Liquid (at m.p.)
Osmium
Not Available
Rank: N/A (Overall)
11.22 g/cm3
Rank: 13 (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
Not Available
Rank: N/A (Overall)
16.90 (Pa)
Rank: 5 (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
Not Available
Rank: N/A (Overall)
2.80 GPa
Rank: 51 (Overall)
Potassium
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7.5.2 Bulk Modulus
Osmium
Not Available
Rank: N/A (Overall)
43.00 GPa
Rank: 28 (Overall)
Cesium
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7.5.3 Young's Modulus
Iridium
Not Available
Rank: N/A (Overall)
8.00 GPa
Rank: 54 (Overall)
Cesium
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7.6 Poisson Ratio
Gallium
Not Available
Rank: N/A (Overall)
0.45
Rank: 2 (Overall)
Beryllium
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7.7 Other Mechanical Properties
NA
Ductile, Sectile
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt
Not Available
Rank: N/A (Overall)
11.85
Rank: 22 (Overall)
Lithium
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8.1.2 Magnetic Ordering
Paramagnetic
Diamagnetic
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
Poor Conductor
Conductor
8.2.2 Resistivity
Mercury
3.00 nΩ·m
Rank: 52 (Overall)
0.18 nΩ·m
Rank: 70 (Overall)
Thallium
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8.2.3 Electrical Conductivity
Silver
0.03 106/cm Ω
Rank: 40 (Overall)
0.06 106/cm Ω
Rank: 32 (Overall)
Plutonium
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8.2.4 Electron Affinity
Gold
Not Available
Rank: N/A (Overall)
19.20 kJ/mol
Rank: 32 (Overall)
Mercury
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9 Thermal
9.1 Specific Heat
Lithium
Not Available
Rank: N/A (Overall)
0.13 J/(kg K)
Rank: 39 (Overall)
Americium
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9.2 Molar Heat Capacity
Americium
Not Available
Rank: N/A (Overall)
26.32 J/mol·K
Rank: 29 (Overall)
Beryllium
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9.3 Thermal Conductivity
Silver
15.00 W/m·K
Rank: 54 (Overall)
46.10 W/m·K
Rank: 33 (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
Not Available
Rank: N/A (Overall)
29.90 µm/(m·K)
Rank: 12 (Overall)
Tungsten
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten
Not Available
Rank: N/A (Overall)
162.10 kJ/mol
Rank: 45 (Overall)
Zinc
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9.6.2 Enthalpy of Fusion
Tungsten
Not Available
Rank: N/A (Overall)
4.27 kJ/mol
Rank: 54 (Overall)
Cesium
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9.6.3 Enthalpy of Atomization
Tungsten
71.00 kJ/mol
Rank: 61 (Overall)
179.90 kJ/mol
Rank: 48 (Overall)
Mercury
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9.7 Standard Molar Entropy
Protactinium
Not Available
Rank: N/A (Overall)
64.20 J/mol.K
Rank: 19 (Overall)
Beryllium
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