H.G. Well’s Traveller goes back in time to persuade J.J. Thomson to not allow Rutherford to observe the nucleus of an atom.
Rutherford’s work will lead to a new theory called quantum mechanics. It’s nearly an inverse of your model, a central positive nucleus surrounded by a negatively charged cloud.

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  1. “The Plum Pudding Paradox” by Jay Werkheiser, Daily Science Fiction, 29 December 2010 [webzine].
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Jay Werkheiser