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Greek Philosopher Leucippus of Miletus and his student Democritus of Abdera is believed to be the first ones to come up with the idea of matter being tiny particals that can't be spereated, or atoms. (coming from the Greek word atomos, meaing indvisable.)
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He was to first to formulate the wave theory of light.
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came up with the idea that the universe is mechnical with small, solid masses in motion.
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Dalton's ideas are comprised of each element is made up of extremely small particles called atoms which comes back from the Greeks understanding, the law that atoms cannot be created or destroyed in any chemical reaction, and all the atoms of a single element are identical, but are different from other elements.
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Kirchhoff came up with the idea of what happens with solid object as they are heated, which then produce light and radiation and forms wavelengths, thus a continues spectrum.
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Made a theory of the connections between electromagnetic waves and light.
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Hertz verified Maxwell's electromagnetic theory of light by proving the existence of electromagnetic waves and the unit of frequency was name Hertz for Heinrich's findings.
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Using his research in cathode rays he discovers the electron and the charge to mass ratio of electrons along with the second model of the atom being the Plum Pudding Model.
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Max came up with an explanation of how atoms can produce light when heated using the idea of quantization.
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Rutherford started working with a fellow scientist name H.G. Moseley and they began using cathode rays to bombard atoms of different elements and discovered the nucleus being the center of the atoms.
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Einstein changed the polictal balance of power, through his scientific foundation in the development of atomic energy.
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With the added research from Rutherford, Bohr devised a more concrete model of the atom showing the electrons on the orbitals, protons and neutrons along with the atomic mass albeit still not completely accurate.
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