C Block Atomic Theory Timeline by Elise LeClair https://padlet.com/eleclair1/ik2l7b7o7gmml9s5 PVPA Science 8 en-us 2022-01-26 16:39:28 UTC 2024-11-28 13:33:56 UTC hello@padlet.com James Chadwick (1891-1974) eleclair1 https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2013985390 Chadwick worked with Rutherford, Bohr and Geiger, famous scientists. He worked in physics on studying the atom. In 1932, He detected an unnamed particle, one with the mass similar to the proton, but neutral - he discovered the neutron. He had used an experiment similar to Rutherford, but used a sheet of beryllium and bombarded it with alpha particles.]]> 2022-01-26 16:41:31 UTC https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2013985390 J.J Thomson(1856-1940) https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021364505 Thomson said the plum pudding  had negatively-charged electrons embedded within a positively-charged "soup.]]> 2022-01-31 14:29:15 UTC https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021364505 democritus and aristotle (384BC - 322BC) alicenawrocki https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021387381 Democritus was the 1st person (that we know of) to have had the idea that there are tiny fundamental particles from which all matter is made. However, Aristotle disagreed with Democritus. Aristotle was very highly regarded, and scientists accepted his views for almost 2000 years.Aristotle was a influential Greek philosopher that was recognized for his work of the atom. Because Democritus was originally wrong about his vision of the neutron. 
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]]> 2022-01-31 14:37:17 UTC https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021387381 John Dalton (1766- 1844) https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021391829 John Dalton thought that atoms were the shape of wooden spheres with small holes in them. He proposed that all matter is made of tiny indivisible particles called atoms, which he imagined as "solid, massy, hard, impenetrable, movable particle(s)".

  
]]> 2022-01-31 14:38:45 UTC https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021391829 Ernest Rutherford. (1871- 1937) https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021394510 Rutherford proved Thomson's Plum Pudding model wrong. He noticed that positive charge is not spread evenly throughout the atom. It is all concentrated in the tiny nucleus. The rest of the atom is just all empty space except for the electrons scattered in it.

]]> 2022-01-31 14:39:40 UTC https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021394510 Bohr, 1885-1962, Copenhagen Denmark https://padlet.com/eleclair1/ik2l7b7o7gmml9s5/wish/2021401329 Bohr studied that scientists thought that energy was only transferred in small units. Bohr's model explained that energy exists everywhere. Bohr did not aknolage subatomic particles in his model.

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