https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne Made by Grace/Elise/Jacob en-us 2020-10-23 16:05:39 UTC 2020-11-06 18:21:04 UTC hello@padlet.com https://padlet.net/icons/png/1f600.png gracewerkenthinfl https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856375409 An ancient Greek philosopher who discovered the development of atomism and the atomic theory. His theory was that everything is composed of atoms that are invisible. He also believed that they were indestructible and always in motion . He determined that they have different atomic spaces and sizes.]]> 2020-10-23 16:09:31 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856375409 https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856380790 John Dalton was a chemist who made the first atomic model that showed all the atoms and their properties. His theory was based off of two laws The law of conservation of mass and the law of composition. The theory states that all matter is composed of atoms. He also says that "while all atoms of an element are identical different elements had different size atoms".]]> 2020-10-23 16:10:49 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856380790 https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856390848 In 1904 J.J. Thompson created this model of an atom that had a positively charged medium with negatively  charged inside. It's called the Plum Pudding model because people thought it looked like pudding with electron inside of it. ]]> 2020-10-23 16:13:07 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856390848 https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856442507 J.J. Thomson discovered the electron by experimenting with a Crookes or cathode ray tube. He demonstrated that cathode rays are negatively charged. He also studied positively charged particles in neon gas.]]> 2020-10-23 16:25:16 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/856442507 gracewerkenthinfl https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898538775 The nuclear atomic model was made in 1911 by a scientist named Ernest Rutherford. ]]> 2020-11-06 17:55:52 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898538775 gracewerkenthinfl https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898586423 The discovery of the charge of an electron was in 1909 by a scientist named Robert Millikan. ]]> 2020-11-06 18:07:33 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898586423 gracewerkenthinfl https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898604560  the Bohr model depicts an atom as a small, positively charged nucleus surrounded by electrons. These electrons travel in circular orbits around the nucleus. This model was created by Niels Bohr. ]]> 2020-11-06 18:12:00 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898604560 gracewerkenthinfl https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898606807 Schrödinger used mathematical equations to describe the likelihood of finding an electron in a certain position. This atomic model is known as the quantum mechanical model of the atom. ]]> 2020-11-06 18:12:35 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898606807 gracewerkenthinfl https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898611501 In May 1932 James Chadwick announced that the core also contained a new uncharged particle, which he called the neutron.]]> 2020-11-06 18:13:42 UTC https://padlet.com/gracewerkenthinfl/1gy1ywswalkxokne/wish/898611501