Describe at least two changes that occurred to the atomic model over time, along with the experimental evidence that made these changes necessary.

I think you could use Bohr model and the Plum Pudding Model

Bohr Model : the one that states atoms consist of positively charged nucleus  and orbited by negatively charged electrons

Plum Pudding model : Atom consist of objects made to pieces with positive and negative charges

hope this helps

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