websites for the periodic table assignment
http://members.optushome.com.au/scottsofta/
http://members.optushome.com.au/scottsofta/Pintro.htm
http://members.optushome.com.au/scottsofta/P06Lavois.htm
http://members.optushome.com.au/scottsofta/P07DobDum.htm
http://members.optushome.com.au/scottsofta/P09Newlands.htm
http://members.optushome.com.au/scottsofta/P10MeyMen.htm
http://www.chem.msu.su/eng/misc/mendeleev/welcome.html
http://www.chemheritage.org/EducationalServices/chemach/ppt/mm.html
http://www.rod.beavon.clara.net/lotharme.htm
http://www.rod.beavon.clara.net/periodic1.htm
http://www.nidlink.com/~jfromm/history/periodic.htm#Dobereiner
http://home.earthlink.net/~ssbeaton/addlinfo/historypertable.html
http://members.optushome.com.au/scottsofta/P12MosSea.htm
http://teidnt3.lbl.gov/seaborg/start.cfm
http://www.chemistry.co.nz/henry_moseley.htm
http://members.optushome.com.au/scottsofta/P11RayRam.htm
http://antoine.fsu.umd.edu/chem/senese/101/history/faq.shtml