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“Chadwick's Model of the Atom.” Kensley, https://kensleyatoms2.weebly.com/chadwicks-model-of-the-atom.html.

Sack, Harald. “Erwin Schrödinger and His Famous Thought Experiment.” SciHi Blog, 12 Aug. 2019, http://scihi.org/erwin-schrodinger-thought-experiment/.

“The History of the Atom.” The History of the Atom, http://thehistoryoftheatom.weebly.com/.

Williams, Matt. “Who Was Democritus?” Universe Today, 27 July 2016, https://www.universetoday.com/60058/democritus-atom/.

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-lived in Britain
-he discovered the neutron and that protons and neutrons were made up of even smaller particles called quarks
-proposed his ideas in 1932
-his experiments included by directing alpha particles towards beryllium atoms, for this created an unknown radiation
-this led him to the revelation of atoms with a neutral charge
-Interesting facts: He broke down protons and neutrons into quarks, for he was the first to discover that.

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-lived in Austria
-proposed that atoms do not have a specific orbital, for he predicts the odds of the location of the atom
-atoms move in waves
-proposed his ideas in 1926
-experiments: Schrodinger's cat: a cat was locked in a box with a radioactive material, and he studied the probability of the container leaking and killing the cat
-it was a study of the decay of atoms
-Interesting facts:  His ideas are known to have discovered the "Electron Cloud".

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-lived in Britain
-he devised that electrons rotate around the nucleus by using energy levels (shells), therefore making it a fixed orbital
-proposed his ideas in 1913
-experiments: the visual spectrum of a prism, for this led him to believe that each atom has a different energy level
-Interesting facts: His model is named the "Energy Level Model". His model is still in use today.

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-lived in Britain
-he came up with the idea that an atom contained a nucleus that consisted of protons and neutrons, and electrons flow in orbit of this nucleus
-formed his ideas in 1911
-he used the golden foil experiment which concluded that the nucleus is positively charged, and it hold most of the atom's mass
-Interesting facts:he came up with the idea that an atom represents a solar system. He also experimented with radioactive alpha particles.

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-lived in Britain
-proposed that atoms are filled with a positively charged fluid, and negatively charged electrons flow throughout the atom
-devised his model 1904
-experiment:the raisins in raisin bread, for the raisins represented the electrons, the bread represented the positive fluid, and whole thing represented an atom
Interesting facts: He also used a cathode ray to prove that atoms contained negatively charged electrons.His model was called the "Plum Pudding Model".

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-lived in Britain
-proposed that atoms of the same element are alike, and atoms of different elements are different
-atoms form to create compounds, and they keep their identities during chemical reactions
-he formed his ideas in 1803
-he experimented with gases, for the total amount of mixed gases, equals the amount of the pressure of individual gases
-Interesting facts:His discoveries led to a decrease in cost in manufacturing.  His theory is still relevant to this day.

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-lived in Greece
-he devised that everything is made up of atoms (5th century bc), for atoms are constantly moving and are indestructible
- experiment: He began to continuously break a stone in half, until he was left with just powder. He attempted to break that particle apart, but could not. Therefore, began the theory of an atom.
-Interesting facts: He is known as a pre-Socrates philosopher.It took nearly 2,000 for his theory t be rediscovered.