Use these links for the webquest:
Atom Basics
http://www.chem4kids.com/files/atom_structure.html
Early Ideas About Atoms
http://galileo.phys.virginia.edu/classes/252/atoms.html
John Dalton's Atomic Theory
http://dl.clackamas.edu/ch104-04/dalton's.htm
JJ Thomson and the Electron
http://thehistoryoftheatom.weebly.com/jj-thomson.html
Rutherford and Bohr Break the "Plum Pudding" Model
http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/rutherford-model.html
http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/Bohr-model.html
Chadwick (and Rutherford) and the Neutron