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The Alchemists found a substance that made silver or gold with more common elements.
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Introduced the atomic theory with atoms were ideal geometric figures.
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Theorized that unsplit table small atoms made all materials in bodies.
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Published the Scopticel about how all matter is composed of important particles from which all materials are constructed.
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Found out the reactants and the total mass of products in a chemical reaction is always the same.
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Theorized that all matter was made of atoms, indestructible building blocks, and were indivisible. Different elements were made of different sized and mass.
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Didn't show any nucleus or electrons and defined an atom to be a ball like structure.
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Proved the arrangement of elements in the order of their increasing atomic weights.
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Found out that electrons charge was always a multiple of precisely determined charges.
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Theorized that tiny negatively charged subatomic electrons or particles were found in atoms.
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Theorized one of the reason atoms break down are radioactive particles.
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Discovered the existence of the element's radium and polonium.
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Was made to explain two properties of the atom.
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Einstein helped revolutionize science through the use of statics and probability by mathematically proving atoms exist.
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Proposed an atomic structure thing that said the inner orbit of an atomic held less electrons than the outside.
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Showed hoe the electrons orbit about the nucleus at different distances.
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Proposed that the number of positive charges in the atomic nucleus is the atomic number.
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Proposed that nearly all of an atom is empty space, so when alpha particles go through the empty space the nucleus has a very little reaction.
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Predicts the likely location of the electron based on a fraction of probability.
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Created the first electron cloud model.
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Discovered the Neutron in atoms.
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Discovered that elements were not only found in individual atoms but instead be found in molecules.