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Democritus states that all matter is made up of particles called atoms.
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Said that atoms are identical and have the same mass.
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George Johnstone Stoney discovered that electricity was made of negatively charged particles, later known as electrons.
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Thomas Edison demonstrates his light bulb that glows for forty hours. Electricity is used to power the light bulb
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Karl Ferdidnand Braun introduced the cathode ray tube with a flourescent tube.
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J J Thomson said that the atom was postively charged and contained negatively charged particles called electrons.
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Ernest Rutherford used the gold foil experiment to find that the nucleus is dense and positive charged. He discovered the proton.
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Neils Bohr said the atomic structure of an atom as "successive orbital shells of electron".
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Erwin Schrodinger said that an electron's movement was like that of a wave.
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John Logie Baird publicly demonstrates his television. The television uses the cathode ray tube.
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James Chadwick discovered the neutron
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John Crofton and Ernest Walton split the atom's nucleus, proving Einstein's theory of relitivity.
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Little Boy is dropped on the enemy city of Hiroshima, Japan and kills 100,000 people during WWII. The atomic bomb was made by splitting the atom.
