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Democritus found that all atoms are invisable
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Newton formulated a theory of light, the three laws of motion and suggested a mechanical universe with small, solid masses in motion.
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Said that atoms can't be created or destroyed
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While using a CRT, Wilhelm Roentgen saw nearby chemicals that glowed. Some of the rays weren't deflected by the magnetic field. Which let him discover X-Rays
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J. Plucker made something used for X-Rays called the Cathode Ray tube
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He said that atoms are a ball of postive charge containing a number of electron, discovered the electron.
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Discovered the existence of isotopes through the use of a mass spectrograph (an instrument for dispersing radiation).
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Fundamental contributions to the understanding of atomic strucutre and quantum mechanics.
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He developed the "gold foil experiment." Rutherford deteremined that the nucleus of an atom is very dense and has a positive charge.
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He proposed the "Electron Cloud Theroy." Schrodinger identified the electron cloud as the propable location of moving particles.
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Chadwick proved the existance of neutron. He discoverd a particle within the nucleus that has a mass similar to that of a proton.
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made something which later lead to the atomic bomb which ended World War 2.
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Ernest Lawrence found that when radioactive isotopes are introduced to the body, they give off an energy or radiation that can be tracked by imaging equipment.
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He conducted the first chain reaction releasing energy from the atoms nucleus.
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The atomic bomb was dropped to finish World War 2. America used Cockroft and Walton's idea, and split the atom to create a nucleur bomb.