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The earliest ideas of atoms, molecules, and chemical reactions marking the beginning of the history of modern chemistry
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In the late 1700's, French scientist Antoine Lavoisier started to compile a list of all the elements that we're know at the time. Their was only 33 known elements categories.
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Developed a table of atomic weights and symbols
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John Newlands proposed an organizational scheme for the elements. He noticed that the elements were increasing by the atomic mass
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Demonstrated a connection between atomic mass and elements properties
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Predicted the existence and properties of undiscovered elements
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Discovered the Noble Gases
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Discovered that atoms contain a unique number of protons called atomic numbers
