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Atoms Through Time

Atoms Through Time. BY: Kevin Urquiza & Paulina Razo. Background. The world as we know it is composed of atoms. As human brains evolved over time, so did the ways humans looked at life. As human thoughts changed, so did the atom. Greek Atomism.

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Atoms Through Time

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  1. Atoms Through Time BY: Kevin Urquiza & Paulina Razo

  2. Background • The world as we know it is composed of atoms. • As human brains evolved over time, so did the ways humans looked at life. • As human thoughts changed, so did the atom.

  3. Greek Atomism • The Greeks had a theory. The thought that the world had to be composed of small elements. • They did no experimenting so all they had was their theories. The decided that the there were 4 different atoms that made up everything in the world: Fire, Water, Wind & Earth.

  4. Solid Sphere Model • The solid sphere model was proposed by John Dalton. • He stated that all matter is made of tiny, indivisible particles called atoms. • According to him, the atoms of the same element were all the same. • He also stated the atoms that are in compounds consist of whole number ratios.

  5. Plum Pudding Model • The plum pudding model was proposed by JJ Thompson. • It was through the use of the cathode ray experiment that led to the discovery of protons and neutrons. • He said that atoms were made-up of big blob that had protons and neutrons sticking to it.

  6. Nuclear Model • The nuclear model was discovered by Rutheford. • Through the use of the gold foil experiment, he discovered the nucleus. • It also led to the fact that atoms are really just empty space. • It was also able to explain why electrons spin around the nucleus.

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