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Unformatted text preview: 3. Compounds form by 2 or more elements combining 4. Reactions are rearrangements of atoms J.J. Thomson: Discovered the electron by working with cathode ray tubes Plum pudding model Plum Pudding Model The atom itself is positive with electrons scattered throughout it to maintain neutrality. Millikan: Found the charge of the electron: 1.6x10-19 Coulombs Rutherford: Gold foil experiment Atom is mostly empty space Discovered the nucleus (small, dense, positively charged) Pluchino Regents Chemistry Nuclear Atom Conclusions: The model of the atom has changed greatly over time Numerous scientists made contributions Billiard ball Plum Pudding Nuclear...
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