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The first person to desrcibe the small particles that make up matter and calling them "atoms".
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Decide that there were no such things as "atoms", which took Democritus's ideas about matter back to the start.
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The person to make up the actual "atomic theory". Brought back the word "atom" meaning the smallest particle of matter.
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Physicist J.J. Thompson (1856 – 1940) designed a series of CRT experiments at Cambridge to determine the ratio of the particle’s charge to its mass.
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Ernest Rutherford (1871 – 1937) studied how positively charged α-particles interacted with solid matter. He designed an experiment to see if α-particles would be deflected as they passed through a thin sheet of gold foil.
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American Physicist Robert Millikan (1868 – 1953) designed an oil drop apparatus to determine the charge of the electron.
