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First person to give the thought of the particle. Used the word atomos to describe the particle. This was around 400 b.c. Atom was indivisible and indesrtuctable to him.
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Robert Boyle replaced the idea that everything was made up of either earth, wind, fire, or air. He proposed the first of the elements in his book called “Sceptical Chymist”.
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He came up with the law of conservation, which is that matter can’t be made or destroyed
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Matter is simply composed of atoms of different weight and it combined in ratios by weight. Believed atoms were indivisible, atoms of the same elements are indentical to eachother, atoms combine in whole numbers and they can't be destroy
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He created the first periodic table of elements arranging elements by atomic mass.
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Used canal rays that had electrical and magnetic properties opposite of an electron, led to discovery of protons.
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Discovered the electron and proved that atoms were divisible by using a a plum pudding model of an atom.
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He introduced what would known as quantum theory m stating the electromagnetic energy could only be emitted in quantized form.
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The measure the charge of a single electron. known as elementary charge one of the fundamental physical physical constants. He used a Milikan's oil-drop apparatus to discover this.
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He was known for father nuclear physics and developed the theory for the structure of the atom.
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He proposed that the relationship was a function of the positive charge on the nucleus
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Bohr explained what happens inside an atom and developed a picture of atomic structure.
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He described how electrons move in a waveform, and developed the Schrodinger equation which describes the quantum state of a system changes with time.
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Discovered the neutron
