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He developed the concept of the atom.
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Developed theory that everything is made of matter.
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A medieval version of chemistry that was considered witchcraft by most. Alchemy talked about elements relative to real chemicals.
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He killed a bunch of people and did nothing for the Atomic Model.
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America fought and argued to free themselves from Britain.
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Developed a theory that all matter is made up of atoms and all atoms are the same size.
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Replaced Aristotle's idea of the four elements with the idea that elements cannot be broken down into other compounds.
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A war between the Union and Confederacy.
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Organized Periodic Table by relative atomic mass.
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Discovered the electron.
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Discovered the negative charge in electrons.
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Discovered that atoms have a nucleus and that the weight is in the nucleus. He also discovered protons and that they have a positive charge.
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Worked with Ernest Rutherford on his discovery of the nucleus.
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Created a model with neutrons and protons in the nucleus and electrons on shelves around the nucleus.
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An assassination of an Austrian Archduke led to a worldwide war, "The War to End All Wars"(not).
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Discovered neutrons and their weight.
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Germany attacked Poland and the war started. US aligned themselves with Poland and a huge war lasted six years.
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The US dropped atomic bombs on Japan.
