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I'm the Atomic Theory I was discovered in 1804 by John Dalton. I have empty space.
I'm the Cathode Ray Tube Experiment I was discovered by J.J Thomson in 1904, a hundred years later after the Atomic Theory. I look like a chocolate chip cookie with all these electrons all over the place.
I'm the Gold Foil Experiment I was discovered by Ernest Rutherford in 1909. I have a nucleus which was barely discovered after 5 years since the last model and a proton in the center. In the surroundings I have electrons.
I'm Line Emission I was discovered in 1913 by Niels Bohr. I have neutrons and protons in the center which is the nucleus. Around the electrons are orbiting the nucleus.
I'm the Quantum Model I was discovered in 1926. I have electrons in "clouds" called orbitals. The location of the orbitals are based on probability.
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