›› Physical and chemical properties of Thallium

Atomic Number:81
Element Symbol:Tl
Element Name:Thallium
Atomic Weight:204.3833
Group Number:13
Group Name:none
Period Number:6
Block:p-block
Ground State Configuration:[Xe] 4f14 5d10 6s2 6p
Ground State Level:2Po1/2
Standard State:Solid
Common Valences:1,3
Bond Length:340.8
Atomic Radius Empirical:190
Atomic Radius Calculated:156
Covalent Radius Empirical:148
Vander Waals Radius:196
Electron Affinity:19.2
First Ionization Energy:589.4
Pauling Electronegativity:1.62
Sanderson Electronegativity:2.25
Allred Rochow Electronegativity:1.44
Mulliken Jaffe Electronegativity:1.96
Density Of Solid:11850
Molar Volume:17.22
Velocity Of Sound:818
Youngs Modulus:8
Rigidity Modulus:2.8
Bulk Modulus:43
Poissons Ratio:0.45
Mineral Hardness:1.2
Brinell Hardness:26.4
Electrical Resistivity:15
Melting Point:304
Boiling Point:1473
Superconduction Temperature:-270.77
Thermal Conductivity:46
Coefficient Of Linear Expansion:29.9
Enthalpy Of Fusion:4.2
Enthalpy Of Vaporization:165
Enthalpy Of Atmization:182
Most Common Oxidation Numbers:3,1
Color:Silvery white
Classification:Metallic
Discovered By:Sir William Crookes
Discovered At:England
Discovered When:1861
Origin Of Name:From the Greek word thallos meaning green twig or green shoot

Calculate the molecular weight of Thallium or molecular weight Tl.

Also see the full list of chemical elements and atomic weights.


››Compounds that contain Thallium

Thallium(I) Bromide  TlBr
Thallium(I) Formate  TlCHO2
Thallium(I) Cyanide  TlCN
Thallium(I) Acetate  TlC2H3O2
Thallium(I) Ethoxide  TlC2H5O
Thallium(I) Chloride  TlCl
Thallium(I) Chlorate  TlClO3
Thallium(I) Perchlorate  TlClO4
Thallium(II) Chloride  TlCl2
Thallium(III) Chloride  TlCl3
Thallium(I) Fluoride  TlF
Thallium(III) Fluoride  TlF3
Thallium(I) Iodide  TlI
Thallium(III) Iodate  TlIO3
Thallium(I) Triiodide  TlI3
Thallium(I) Nitrate  TlNO3
Thallium(III) Nitrate  Tl(NO3)3
Thallium(I) Hydroxide  TlOH
Thallium(I) Hexafluorophosphate  TlPF6
Thallium(I, III) Bromide  Tl2Br4
Thallium(I) Carbonate  Tl2CO3
Thallium(I) Oxalate  Tl2C2O4
Thallium(I) Molybdate  Tl2MoO4
Thallium(I) Oxide  Tl2O
Thallium(III) Oxide  Tl2O3
Thallium(I) Sulfide  Tl2S
Thallium(I) Sulfate  Tl2SO4
Thallium(I) Selenide  Tl2Se
Thallium(I) Selenate  Tl2SeO4
Thallium(I) Telluride  Tl2Te