https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS Science Class 9D Scientists that made it possible to have an atomic model. By: Isabella Matute & Grecia Martinez en-us 2021-10-04 15:31:12 UTC 2023-02-14 02:02:36 UTC hello@padlet.com https://padlet.net/icons/png/1f52c.png Isa0107 https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1794393207 First ( not scientists) people/ philosophers that didn't only rely on religion. They were the first philosophers that more or less talked in a more scientific way. They had ideas on what matter was composed of. Aristotle developed his theory ( shown in the picture above.) from around 484 to 322 B.C.E, while Democritus developed his theory in around 400 B.C.E.]]> 2021-10-05 20:44:45 UTC https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1794393207 Isa0107 https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804721463 He built an atomic model called the " Atomic Theory of Matter."  In this theory, he said that each type of matter is made out of one type of atom. He also said that each type of atom could be put into a group called an element and that every atom of a given element was identical. Another hypothesis said by Dalton, was that atoms could not be created, divided into smaller parts, or destroyed. ]]> 2021-10-10 00:53:20 UTC https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804721463 Isa0107 https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804725201  Thompson used a vacuum tube with metal plates at both ends and an electrical source for his experiment. This allowed him to find out that a beam would form between two plates; the cathode and the anode. When putting a magnet near the beam, he observed that it caused it to bend, meaning that the particles of the beam were electrically charged. Thompson also discovered that the cathode rays were made of negatively charged particles, that were later called electrons. He stated that negatively charged electrons must be stuck all throughout a positively charged area.]]> 2021-10-10 01:00:49 UTC https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804725201 Isa0107 https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804734857 He and his team beamed positively charged alpha particles at a sheet of really thin gold foil. They noticed that because so many particles could pass through the thin gold foil, the gold atoms must be made of mostly empty space. They also observed that some particles did actually bounce off, so after checking his hypothesis, he stated that a gold atom must have some very small, positively charged mass. He named this mass, the nucleus. He gave the name protons, to the positively charged nucleus particles, and said that the electrons were scattered in empty space around the nucleus. ]]> 2021-10-10 01:18:11 UTC https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804734857 Isa0107 https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804735807 He was a student of Rutherford and found new particles in the nucleus that weren't affected by an electric field at all. The Alpha particles in the experiment had knocked them loose. He called these uncharged particles neutrons. ]]> 2021-10-10 01:19:51 UTC https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804735807 Isa0107 https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804798004 Bohr discovered that electrons are arranged in energy levels. The lower energy levels are closer to the nucleus and can hold just a few electrons, while the higher energy levels are farther away and can hold more electrons. Nowadays, lots of scientists rely upon and have refined the " Bohr Model."]]> 2021-10-10 02:59:39 UTC https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804798004 Isa0107 https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804800661 There have been also lots of other teams of scientists that have made corrections and new discoveries of atoms and matter are discovered all the time. To conclude, scientific discoveries are still going to be accomplished today, and for a long time. ]]> 2021-10-10 03:03:34 UTC https://padlet.com/Isa0107/sciencepadlet19293892389_8BSCIENCECLASS/wish/1804800661