John Dalton discovered in 1803 that atoms of different elements in simple whole numbers to create compounds. Atoms can not be created or destroyed.
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The Democritus said that everything is composed of atoms, but between atoms lies space, and that atoms are indestructible.
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Plato did not believe in the atom theory. He believed all matter was made up of the four elements which are Fire ,Earth, Air and water.
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The alchemists started looking more into Aristotle theory. The goal was to change the structure of the atom, but they failed to turn common items into gold. They did create a scientific process which allowed to go into more depth of the atom.
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Boyle believed that chemistry could be explained through the motion of atoms.
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Lavoisier is known for his discovery on how oxygen plays a role in combustion. He recognized and named oxygen and Hydrogen.
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John Dalton discovered that atoms of different elements in simple whole numbers to create compounds. Atoms can not be created or destroyed.
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Dmitri first contributed in the first periodic table of elements. He described chemical elements based on atomic weight and valency.
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Aristotle was not a scientist, he was a philosopher. He believed everything was a combination of fire,earth,water and air. His theory was that a mass of incomprehensible size was everywhere; he called this 'hyle'.
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The Curies discovered the existence of the elements radium and polonium in their research Pitchblende. They found extra radiation by considering uranium alone.
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Thomson is credited with the discovery of an electron. The negatively charged particle in an atom.
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Ernest discovered the nuclear structure of the atom Ernest determined that there were different types of radiation. From there he figured out helium gas could be formed into radioactive substances.
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Albert founded the mass-energy equivalence formula, which became one of the most famous equation. He also came up with any liquid is made up of mass.
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Robert is well known for his oil drop experiment. Which confirmed the existence of an electron and was certain with the charge.
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Mosely is well known for his contribution to the atomic number based on Neil Bohrs theory. He came up with his own experiment called Mosely's law in the X-ray spectra.
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Neils Bohr was the first to discover that electrons travel separately around the nucleus. Also that the number of electrons determine the properties of an element.
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Werner contributed to the atom because he formulated quantum mechanics and discovered the uncertainty principle, which states that a particle’s position and momentum cannot both be known exactly.
