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Aristotle considered inductive and deductive reasoning. Initially, Aristotle did not believe in the idea of the Atomic Theory. He preached that all substances were made of fire, water, air and earth.
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Democritus developed the initial idea of the atom.
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John Dalton's theory stated that all matter is composed of atoms. You cannot decompose an atom. All atoms are identical. His theory remains valid.
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Lavoisier kept the idea of balance in mind while making a theory about the atom.
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He was a french chemist. His theory stated that no matter how a compound was created, they are each composed of the exact amount of proportions of elements.
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He discovered electromagnetic induction.
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He developed the theory of relativity.
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In 1897, Becquerel accidentally discovered that uranium salts spontaneously emitted a penetrating radiation that could be registerted on a photographic plate.
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Thomson discovered the electron. He pictured the atom as a sphere of positive matter charged by electrons.
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Following the work of others before her, Marie created the term "radioactive" and discovered the radioactivity elements and substance, such as pitchblend.
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He was led to the problem of distribution of energy in the spectrumof full radiation.
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Millikan measured the charge of an electron. Thoman's hypothesis is verified and Millikan confirmed that the mass of an electron is 1000 times smaller than the smallest atom.
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He was awarded the nobel prize in chemistry for 1908. He discovered radioactivity. This included alpha and beta rays.
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He was honored as one of the best scientists of modern physics. He is best known for his knowledge towards quantum theory and won a nobel prize on his knowledge of the atom.
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Schrodinger followed the atomic model opf Niels Bohr and using a thesis from de Broglie, he articullated the movements of electrons in terms of wave mechanics as opposed to particle leaps.
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He began to develope the idea of the wave mechanics theory. He won a nobel prize for his work in 1929. He understood the physical nature of the atom.
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In 1932, Chadwik made an exquisite discovery. He discovered the existence of neutrons; tiny atoms without any electrical charge.
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Discovered transuranium elements.
