1. Radioisotopes defined (HSC chemistry)
Channel: Letslearnscience
Date: 2012-01-05

Covers the HSC chemistry syllabus dot point:" distinguish between stable and radioactive isotopes and describe the conditions under which a nucleus is unstable"

Link to production of material module:
http://www.youtube.com/playlist?list=PL49FAB756081270BA

Link to the acidic environment module:
http://www.youtube.com/playlist?list=PLB755F0C836855EAB

Link to atom builder: http://phet.colorado.edu/en/simulation/build-an-atom

Awesome simulations on that website, check them out!