History of the Atom by Zoey Love Krauss https://padlet.com/25051130/38fls0pe6s4jkx7x Made by: Mauricio, Isaac, and Zoey en-us 2022-10-10 18:37:57 UTC 2022-10-10 18:59:42 UTC hello@padlet.com https://padlet.net/icons/png/1f468-1f52c.png Democritus (450 B.C.) https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334059516 The Greek philosopher Democritus introduced the idea of the atom. However, the idea was essentially forgotten for more than 2000 years.

]]> 2022-10-10 18:44:38 UTC https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334059516 John Dalton (1800's) https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334059988 John Dalton re-introduced the atom. He provided evidence for atoms and developed atomic theory. His theory is essentially correct. However, he incorrectly thought that atoms are the smallest particles of matter.

]]> 2022-10-10 18:45:03 UTC https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334059988 J.J. Thomson (1897's) https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334061162 J.J. Thomson discovered electrons. He proposed the plum pudding model of the atom. In this model, negative electrons are scattered throughout a "sea" of positive charge.]]> 2022-10-10 18:46:05 UTC https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334061162 Ernest Rutherford (1911's) https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334061385 Ernest Rutherford discovered the nucleus. He later discovered protons as well. Rutherford thought that electrons randomly orbit the nucleus.]]> 2022-10-10 18:46:15 UTC https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334061385 Niels Bohr (1910's) 25051130 https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334067705  Niels Bohr agreed with the planetary model of the atom, but also knew that it had a few flaws. Using his knowledge of energy and quantum physics he was able to perfect Rutherford’s model. He was able to answer why the electrons did not collapse into the nucleus. ]]> 2022-10-10 18:51:41 UTC https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334067705 Erwin Schrödinger 2502430 https://padlet.com/25051130/38fls0pe6s4jkx7x/wish/2334077792 (1920's)

 Erwin Schrödinger was a revolutionary physicist who used Heisenberg’s uncertainty principle to come up with the atomic model that we still use today. 




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