In the early 1900's many scientists had turned their attention to investigating the structure of the atom. Many models were proposed and a handful have been adopted as ways to describe the atom. Neither of them are perfect but they have brought us a long way toward understanding these building blocks. Three of particular interest to us in physics are:
Even though these models are different, neither one excludes the other two. Accepting one model does not cancel out the other two. It is possible to accept all three models at the same time.
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