If you are using it for one of your Boy Scout requirements, see your handbook for a list of things you can teach. For most recent ILSC, our leader used making a paper airplane to demonstrate the EDGE method. What you teach should fit your audience and any requirement you are trying to fulfill. Reply.
Uses of Thallium. Thallium sulfate, which is odorless and colorless, was used as a rat poison and as an insecticide. This use has been discontinued in some countries, including the USA. Thallium sulfide is used in photocells because its electrical conductivity increases on exposure to infrared light.
Thallium has 25 isotopes which have atomic masses that range from 184 to 210. 203 Tl and 205 Tl are the only stable isotopes, and 204 Tl is the most stable radioisotope, with a half-life of 3.78 years.205 Tl represents the final decay product of the 4n+1 decay chain (also known as the neptunium series).hallium is found in the minerals crookesite TlCu 7 Se 4, hutchinsonite TlPbAs 5 S 9, and lorandite TlAsS 2. Thallium also occurs as a trace element in iron pyrite, and thallium is extracted as a by-product of roasting this mineral for the production of sulfuric acid.