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All matter was composed of four elements: earth, air, fire and water.
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This included precious metals as well as elixirs to cure disease and prolong life.
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With the right combination of elements, it was theorized, any substance on earth might be formed.
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Democritus was the first to identify the possibility of an atom, which would be the smallest piece of matter
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Democritus believed that atoms are indivisible, all are exactly alike, and that all matter is made up of atoms.
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Democritus theory stated: Atoms cannot be erased or deleted from existence, merely changed. Atoms are able to generate anything any size or composite.
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Born colour blind in Eaglesfield, England.
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Dalton was accepted into the manchester's literary and philosophical society.
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In 1803 John revealed his concept of the daltons law
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Developed modern atomic theory
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Passes away at 78 years old
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Born in Paris, France
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J.J. Thomson was born in Cheetham Hill, England
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Born in Paris France
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Born in Warsaw, Poland
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Attended Owens college at the age of 14
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Born in Spring Grove, New Zealand.
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Thompson entered the college as a minor
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Born in Copenhagen, Denmark
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At the age of 18 he left for the city of Christchurch, where he had won a scholarship to Canterbury College, now the University of Canterbury.
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Born in Bollington, United Kingdom
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Pierre gets his doctor of science degree.
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Becquerel thought that phosphorescent materials, such as some uranium salts, might emit penetrating X-ray-like radiation when illuminated by bright sunlight.
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After other experiments involving non-phosphorescent uranium salts, he arrived at the correct explanation, namely that the penetrating radiation came from the uranium itself, without any need for excitation by an external energy source.
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Henri Becquerel discovers radioactivity
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discovered rays from radioactive materials, which he named Alpha and Beta.
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Marie Curie and her husdand created a new element called Polonium.
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Curies announced the existence of a second element, which they named "radium."
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Ernest Rutherford discovered a radioactive gas called Radon today.
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Another discovery was the circumstance that the allegedly active substance in uranium, uranium X, lost its radiating ability in time,
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Becquerel shared the Nobel Prize in Physics with Pierre and Marie Skłodowska-Curie
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discovered all matter is made up of tiny particles
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Discovery of the electron.
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Passed away at the age of 47
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Rutherford was awarded the 1908 Nobel Prize in Chemistry for his theory of atomic structure.
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Passed away at the age of 56
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Ernest Rutherford discovers protons
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Passed away at the age of 67
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James Chadwick won a noble prize for his discovery of the neutron and the tributes it made to the Atomic Theory.
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Passed away at the age of 66
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Passed away at the age of 84
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Neils Bohr's ideas and work helps the International Atomic Energy Agency.
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Neils Bohr was given the Atoms for Peace Award in 1957.
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Passed away at the age of 77
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Passed away at the age of 83
