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Died with the belief that all materials of earth were not made of atoms but of four elements: Earth, Fire, Water and Air.
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He discovered atoms and that all matter was made of extremely small particles that could not be divided. BC
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He was the first person to make good use of the balance, after a visit with Priestly he began careful study of the burning process and proposed the Combustion Theory which was based on sound mass measurements.
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Published the Law of Definite Proportions , which states that a compound is composed of exact proportions of elements by mass, regardless of how they were made.
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He identified the hereditary nature of red-green color blindness and revealed the concept of Dalton's Law of Partial Pressures. He also provided atoms exist by discovering that compounds have a fixed composition.
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An English Scientist who studied the fields of electromagnetism and electrochemistry.
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Concluding that atoms could be radioactive and also won the Nobel Prize in Physics for the discovery of Radioactivity.
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He discovered the electron and demonstrated that cathode rays were negatively charged. He studied positively charged particles in neon gas.
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Both are best known for their work in the study of Radioactivity , leading to the discovery of the elements for radium and polonium.
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Discovered energy quanta winning him the Nobel Prize in physics. He also showed that light must be absorbed in descrete amounts.
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Formulated the Special Theory Of Relativity, which laid basis for the release of atomic theory.
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He discovered and designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.
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Proposed a theory for the hydrogen atom based on quantum, that energy is transferred only in certain well defined quantities.
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The american experimental physicist honored with the Nobel Prize for Physics for the measurement of the elementary electronic charge and for his work on the photoelectric effect.
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Awarded the Nobel Prize in Physics for the discovery of the Neutron tracking down evidence of Rutherford's tightly bound proton-electron pair.