Who discovered the proton?

interesting question, and sadly I had no idea just had to guess

Yet another famous New Zealander who split the atom, but then he regretted it after he saw how it was used.

RandalD, your experiment does not work. If he fired electrons at a nucleus they would be absorbed in a process called beta absorption (weak nuclear interaction). If, however, he fired protons or alpha particles (helium nuclei, which he used), these being positively charged would be deflected, positive-positive, by the nucleus. You have the right idea, but not electrons.