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 is a member of the aluminum family, Group 13 (IIIA) on the periodic table. The periodic table is a chart that shows how chemical elements are related to one another. Thallium is also a member of the heavy metals, along with gold, platinum, and lead. Thallium was first discovered by means of a spectroscope. A spectroscope is a device for analyzing the light produced when an element is heated.