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John Dalton
Experiments with gasses. Atoms of different elements combine in simple whole numbers to form compounds. 5, Atoms cannot be created or destroyed. -
JJ Thomson
Experiments with ray tubes, showed that all atoms contain tiny negatively charged subatomic particles or electrons. He did a plum pudding (blue berry muffin) model of the atom that had negatively-charged electrons being planted into positively-charged space. -
Ernest Rutherford
Experiment, which demonstrated the nuclear nature of atoms by deflecting alpha particles passing through a thin gold foil, 1. most particles went straight through, 2. The particles are bouncing getting the path bent, 3. The least amount of particles are bouncing back. -
Niels Bohr
Niels Bohr's had a theory about hydrogen atoms based on the quantum theory, which means energy transferred in certain, defined quantities. His actual experiment involved electrons orbiting around the nucleus. -
James Chadwick
Chadwick tracked down evidence of Rutherford's tightly bound "proton-electron pair". Helping out Ernest Rutherford. Some evidence of his helping includes, "Beryllium, when bombarded by alpha particles, emitted a very energetic stream of radiation"
