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Atomic Theories: Niels Bohr & Heisenberg

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Atomic Theories: Niels Bohr & Heisenberg

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1.Electrons orbited the nucleus at fixed energies and distances. They are able to jump from one level to another, but not exist in the space between
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3.  experiments showed that rather than simply being discrete particles, eelctrons behaved like waves. Not beinf confined to a particular point in space
4. Werner Heisenberg showed it was impossible to determine the exact position and speed of electrons as they moved around an atom. Electrons can exist within a range of possible locations.

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1. atoms constited largely of empty space, with just a few electrons. Most of the mass concentrated in the center, aka the nucleus
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3. Studied the effects of X-rays on gases, and decided to investigate atoms more closely. He shot small, positively charged alpha particles at a sheet of gold foil. Most of the particles did pass throug, some bounced right back
4. Father of the nuclear age; On his model, the atom's thinly dispersed positive charge was not enough to deflect the particles in any one place. Effect was like a bunch of tennis balls punching through a thin paper screen.

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1. discovered electron: choclate chip cookie model of the atom. Showed atoms as uniformly packed spheres of positive matter, filled with negatively charged electrons.
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3.no real experiment
4. Won nobel prize for his discovery of the electron

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1. The atom was depicted as having a particular size and mass; could not be created nor destroyed
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3. Common substances always broke down into the same elements in the same proportions
4. Concluded that various compounds were combinations of atoms of different elements

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1. They depicted the atom to be tiny particles surrounded by empty space, and they varied in size and shape.
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3. No experiment, but his ideas were opposed by the more popular philosophers of his day
4. No real conclusion, but Aristotle, and many others, thought that matter was made up of the four elements: earth, wind, water and fire

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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.

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7. Go BACK and click COPY LINK TO CLIPBOARD.

8. Submit that link on Google Classroom.