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Download Vocab: 1. Atamos 2. Indivisible 3. Indestructible 4. Atom 5. Electron 6
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Vocab: 1. Atamos 2. Indivisible 3. Indestructible 4. Atom 5. Electron 6. Neutron 7. Proton 8. Alpha Particle 9. Orbital 10. Energy Level 11. Planetary Model 12. Isotope 13. Theory 14. Law 15. Law of Definite Composition 16. Law of Definite Proportion 17. Element 18. Compound 19. Gold Foil Experiment 20. Wave Model 21. Electron Cloud 22. Law of Multiple Proportions 23. Electromagnetic Spectrum 24. Subatomic Particles 25. Quark & Lepton 26. Neutral Key Concepts 1. The BC Atomists 2. Democritus 3. Aristotle - He was a huge proponent of the 4 core elements - Greek Philosophers - Chinese Philosophers - Indian Philosophers - Particle of matter that was indestructible and indivisible. They related that to the atom. 4. Anton Lavoisier 5. Law of Definite Composition 6. Joseph Proust 7. John Dalton - Called the Father of the Atomic Theory -Presented to the world an Atomic Model and an Atomic Theory - Atoms were spherical, solid, indestructible, and indivisible - Atoms of a particular element are exactly alike - Atoms of particular elements combine to make compounds. Always combine in the same way. - Did use the term particle 8. JJ Thompson -Cathode Experiment -Discovered the electron -Negatively charged -Presented the Plum Pudding Model to the World -Mistakenly placed the electrons inside the atom 9. Chadwick- discovered the neutron -neutral particle -found in the nucleus 10. Ernest Rutherford -Gold Foil Experiment -Used alpha particles -Discovered the nucleus of the atom -Knew that it was positively charged -reasons- the results of his experiment a. most particles went through the foil b. some particles came back to their original source c. few particles hit a solid spot in the foil and deflected - put electron in a nucleus around an electron cloud - electron cloud- a mass of unorganized electrons moving freely at great speedsno organization 11. Neils Bohr -revised Rutherfords work -organized electrons on energy levels -Planetary Model- revised Rutherford model -Bohr gave us energy levels called orbitals, organized electrons, told us they were energized, they moved in waves 12. The 7 types of radiation from the electromagnet spectrum -radio -microwaves -infrared -visible light -UV - x-rays - gamma
