Thallium:  Tl

^{Atomic Number: 81}

Was Discovered By

in 1861 in England. (Nice beard, dude)

Atomic Mass: 204.3833 g/mol

Common Isotopes

Ground State Electron Configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p

Common Oxidation States:  Tl (I) , Tl (III)  -more info

Physical Appearance:  A soft gray solid metal that looks like lead. 

Often Thallium is described as silvery white.

Thallium is so soft that it can be cut by a knife.

(This is a picture of a Thallium Rod)

Physical Properties: Mp (^oc) = 303 , Bp (^oc) = 1473

Hexagonal (close-packed) Crystal structure , Density (@ 293K) = 11.85 g/cm³

more...

Electronegativity:  1.4

Sources of Thallium:   Found in pyrites

Price Per Gram: $30.85 (of 99.999% pure solid Tl)

Uses: Commonly used in rat and ant poisons. 

Also used for detecting infrared radiation.

Questions and Comments, me.

Sources

Artistic sources reference pages belonging to my friends.

This page made for Mr. Bean's Chem 1b class at Pomona College by Michael Fanjul, class 2004.