Hooke's Law http://www.matter.org.uk/Schools/Content/HookesLaw/index.html
Atomic Structure http://web.jjay.cuny.edu/~acarpi/NSC/3-atoms.htm
Spectra of Gas Discharges http://astro.u-strasbg.fr/~koppen/discharge/index.html
Chemical Formula and Names Worksheet http://sun.menloschool.org/~dspence/chemistry/formulae/review_quiz.html
VSEPR Theory Activity http://www.saskschools.ca/curr_content/chem20/covmolec/movies/vseprmat2.html
Ripple Tank Demo http://www.falstad.com/ripple/