https://padlet.com/3862161/g3pc0c35x3gpjod0 Cassie Alcala Period 0 en-us 2023-09-26 16:20:35 UTC 2023-09-27 06:02:29 UTC hello@padlet.com https://padlet.net/icons/png/269b.png 3862161 https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722511269 Democritus believed everything in the world was made up of tiny particles surrounded by empty space. He also said that these small particles vary in size and shape depending on the substance they composed. He called these particles, "atomos." ]]> 2023-09-27 05:34:41 UTC https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722511269 3862161 https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722516145 Aristotle disagreed with Democritus. Instead, he believed that matter was made up of four elements, earth, wind, water, and fire. ]]> 2023-09-27 05:40:04 UTC https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722516145 3862161 https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722524691 Dalton proved that common substances always broke down into the same elements. he then determined that compounds were combinations of atoms, of different elements. he also concluded that atoms could never be created or destroyed. Because of Dalton's discovery, atomic theory was now accepted by the science community. ]]> 2023-09-27 05:49:08 UTC https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722524691 3862161 https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722529131 Thompson discovered electrons in 1897. He described atoms as, "uniformly packed spheres of positive matter, filled with negatively charged electrons." ]]> 2023-09-27 05:53:16 UTC https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722529131 3862161 https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722538096 Rutherford became known as the father of the nuclear age. He wanted to study atoms more, so he shot positively charged alpha particles at a sheet of gold paper. Most of the particles passed right through, however, some bounced back. He then concluded that atoms consisted mainly of empty space. He believed that most of the mass was in the center, with a few electrons away from the center. He named the center of the atom, the nucleus. ]]> 2023-09-27 06:02:29 UTC https://padlet.com/3862161/g3pc0c35x3gpjod0/wish/2722538096