The History of an Atom by Elise Mears https://padlet.com/203734/3jvemw8vghcq Jada and Elise en-us 2016-11-10 19:02:50 UTC 2026-02-05 14:39:21 UTC hello@padlet.com Aristotle  203734 https://padlet.com/203734/3jvemw8vghcq/wish/136863144 Aristotle was a very well respected philosopher that favored earth, fire, air and water. He used these four elements to approach matter. The ideas he created along with Plato were incorrect, but still held together due their popularity.
Image Link ]]> 2016-11-10 19:23:12 UTC https://padlet.com/203734/3jvemw8vghcq/wish/136863144 Democritus 400 B.C. 2102271 https://padlet.com/203734/3jvemw8vghcq/wish/136863975  Image Link
Democritus was a Greek philosopher that started his discovery for matter over 2,400 years ago. Democritus wanted to know if matter could be split into smaller pieces forever or if there is a limit to how much matter can be split up. ]]> 2016-11-10 19:25:05 UTC https://padlet.com/203734/3jvemw8vghcq/wish/136863975 J.J. Thomson 2102271 https://padlet.com/203734/3jvemw8vghcq/wish/137080349 1897
J.J. Thomson, an English scientist proved the information that an atom is made of even smaller pieces. He also studied the passage of an electric current through gas and discovered electrons.
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]]> 2016-11-11 19:10:19 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137080349 Dalton 203734 https://padlet.com/203734/3jvemw8vghcq/wish/137080835 1803
Dalton preformed the first experiment to prove his idea of atoms. He came to the conclusion that all elements are made up of atoms.
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]]> 2016-11-11 19:12:08 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137080835 Rutherford 203734 https://padlet.com/203734/3jvemw8vghcq/wish/137207880 1911
Rutherford preformed his famous Gold Foil Experiment to form his model of atom. He used a gun that shot positively charged particles at a sheet of gold foil. He eventually discovered the nucleus when some charged particles bounced back off of the foil.
Image Link]]> 2016-11-13 17:36:40 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137207880 The Wave Model 203734 https://padlet.com/203734/3jvemw8vghcq/wish/137210889 Today
This modern atomic model is based off of the idea of wave quantum mechanics. The electrons do not move in a certain path around an atom; therefore, it can not be determined where the electrons are.
Image Link ]]> 2016-11-13 18:10:57 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137210889 Electron Clouds 203734 https://padlet.com/203734/3jvemw8vghcq/wish/137211690 The electrons are in a space (cloud or orbital) where they go around the nucleus. The location of the electrons depend on the amount of energy they each have.

Image Link ]]> 2016-11-13 18:20:27 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137211690 James Chadwick 1932 203734 https://padlet.com/203734/3jvemw8vghcq/wish/137213442 Chadwick constantly worked with beryllium atoms and alpha particles, and eventually a radiation was produced. It was made up of particles with a neutral charge and had a mass similar to a proton. He had discovered the neutron.
Image Link ]]> 2016-11-13 18:39:26 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137213442 The Bohr Model 1913 2102271 https://padlet.com/203734/3jvemw8vghcq/wish/137230560 Within the Bohr Model, the electrons are in rings around the nucleus. These rings represent different energy waves on the outside of the nucleus.]]> 2016-11-13 21:55:47 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137230560 Erwin Schrodinger 1926 2102271 https://padlet.com/203734/3jvemw8vghcq/wish/137231178 Schrodinger shared the idea that electrons can be particles and waves. This theory created the quantum mechanical model of an atom. Erwin Schrodinger believed that an electrons can be in all of it's forms at one time.]]> 2016-11-13 22:03:52 UTC https://padlet.com/203734/3jvemw8vghcq/wish/137231178 Henry Moseley 2102271 https://padlet.com/203734/3jvemw8vghcq/wish/137232201 1913
Henry Moseley came up with and approved that in all atoms within any element have the same amount of protons inside the nucleus. 
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