Atomic Theories Padlet by Madeline Perales https://padlet.com/388905/fr21h5majo2hk2jv Madeline Perales Period 0 en-us 2023-09-26 16:19:32 UTC 2023-09-27 04:53:00 UTC hello@padlet.com https://padlet.net/icons/png/269b.png How do I share it with you? 388905 https://padlet.com/388905/fr21h5majo2hk2jv/wish/2721573150
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    • ]]>     2023-09-26 16:19:32 UTC https://padlet.com/388905/fr21h5majo2hk2jv/wish/2721573150     What do I do? 388905 https://padlet.com/388905/fr21h5majo2hk2jv/wish/2721573151 This is due next class meeting, if not completed this period!

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    Video: https://www.youtube.com/watch?v=xazQRcSCRaY&pp=ygUVdGVkIGVkIGF0b21pYyB0aGVvcnkg]]>     2023-09-26 16:19:32 UTC https://padlet.com/388905/fr21h5majo2hk2jv/wish/2721573151     Atomic Theories: Democritus Proposal 388905 https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722432031 1. They depicted the atom to be tiny particles surrounded by empty space, and they varied in size and shape.
    2. sketch: ^
    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]]>     2023-09-27 04:20:18 UTC https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722432031     Atomic Theories: John Dalton 388905 https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722442622 1. The atom was depicted as having a particular size and mass; could not be created nor destroyed
    2. sketch ^
    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]]>     2023-09-27 04:27:24 UTC https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722442622     Atomic Theories: J.J Thompson 388905 https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722449929 1. discovered electron: choclate chip cookie model of the atom. Showed atoms as uniformly packed spheres of positive matter, filled with negatively charged electrons.
    2. Sketch ^
    3.no real experiment
    4. Won nobel prize for his discovery of the electron]]>     2023-09-27 04:34:52 UTC https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722449929     Atomic Theories: Ernest Rutherford 388905 https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722460158 1. atoms constited largely of empty space, with just a few electrons. Most of the mass concentrated in the center, aka the nucleus
    2. sketch ^
    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. ]]>     2023-09-27 04:44:29 UTC https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722460158     Atomic Theories: Niels Bohr & Heisenberg 388905 https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722464835 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
    2 Sketch ^
    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.]]>     2023-09-27 04:49:09 UTC https://padlet.com/388905/fr21h5majo2hk2jv/wish/2722464835