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Describing the atom: The way and how the electrons moved in a cloud formation.

Conclusion: He could only predict where an electron might be at any given time. You cannot know both the position and speed of a particle with perfect accuracy.

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Describing the atom: Electrons orbit the nucleus at fixed energies and distances, able to jump from one level to another but not to exist in the space between.

Conclusion: Rather than being discrete particles, electrons simultaneously behaved like waves, not being confined to a particular point in space.

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Describing the atom: The atoms thinly dispersed positive charge.

The alpha particles pass through the gaps but bounce back from the dense positively charged nucleus.

Experiment: Shot small, positively charged alpha particles at a sheet of gold foil.

Conclusion: Atoms consisted largely of empty space with just a few electrons, while most of the mass was concentrated in the center (the nucleus)

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Describing the atom: Uniformly packed spheres of positive matter filled with negatively charged electrons.

Conclusion: Thomson won a Nobel

Prize in 1906 for his electron discovery.

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Describing the atom: Common substances always break down into the same elements in the same proportions.

Conclusion: He concluded that the various compounds were combinations of atoms of different elements, each of a particular size and mass that could never be created or destroyed.

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This is due next class meeting, if not completed this period!

Instructions on how to turn in are below.

Video: https://www.youtube.com/watch?v=xazQRcSCRaY&pp=ygUVdGVkIGVkIGF0b21pYyB0aGVvcnkg

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1. Click arrow under your profile pic.

2. Click ADD MEMBERS.

3. ADD my email. Give me CAN ADMINISTER access.

4. Go BACK and go to CHANGE PRIVACY.

5. Click PUBLIC.

6. Make it so visitors can view.

7. Go BACK and click COPY LINK TO CLIPBOARD.

8. Submit that link on Google Classroom.