https://padlet.com/nomehrara/ivis0fp6v74ji8iz en-us 2020-12-07 01:33:59 UTC 2026-01-22 15:29:22 UTC hello@padlet.com nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992515506 He said if you keep cutting bread (or an object) in half it would get too small to cut in half and that was an atom. 400 B.C]]> 2020-12-07 01:35:09 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992515506 nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992527894 He said that all matter is made up of four elements, fire, air, water, and earth. 322 B.C]]> 2020-12-07 01:41:35 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992527894 nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992531148 Dalton found out how to measure atomic weight and had the first atomic theory in over 2000 years. 1803 ]]> 2020-12-07 01:43:23 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992531148 nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992533795 Discovered the electron and changed the whole atomic theory by adding negative and positive charges to an atom. he was later proved wrong because there was also neutral charges. 1897]]> 2020-12-07 01:44:54 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992533795 nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992538072 He redesigned our view of an atom, had the theory that an atom is mostly empty space, and added the nucleus to the atomic model. 1908 ]]> 2020-12-07 01:47:19 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992538072 nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992551114 He proposed that electrons do not circle the nucleus at random orbits but orbit the nucleus at fixed distanced farther away from the nucleus. 1913]]> 2020-12-07 01:54:36 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992551114 nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992557297 He discovered the neutron. 1932]]> 2020-12-07 01:58:18 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992557297 nomehrara https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992562354 They made the theory that electrons orbit the nucleus at a fast pace and not like a planet. 20th century]]> 2020-12-07 02:01:25 UTC https://padlet.com/nomehrara/ivis0fp6v74ji8iz/wish/992562354