Why pay Flinn's outrageous prices when you can use this for free? The game consists of 29 isotope tiles, using alpha and beta decay to form a single decay chain. Students can work solo, in pairs, or in groups. Students start with Uranium-236 and must place either an alpha particle or beta particle next before placing the daughter isotope formed (ex: Uranium-236, then alpha, followed with Thorium-234), linking isotopes through decay until ending the chain with Lead-206. Works best as a practice activity (i.e. warmup, review, or in class after notes). For long-term storage, laminate the cut-outs. Virginia SOL standards: Chemistry, CH 2.b (investigations of isotopes, half-life, and radioactive decay).