Here are some resources and links to help you to put together a document (either a google doc or a powerpoint) on the development of the model to describe what an atom looks like.
LINK 3 - early ideas about the atom
LINK 4 - problems with the plum pudding model
LINK 5 - the gold foil experiment and what it meant
LINK 6 - Niels Bohr
Link 7 - proton discovery