https://padlet.com/mayrams2505/8e95zoz1ir3roqq en-us 2022-10-14 06:40:13 UTC 2022-10-17 05:12:14 UTC hello@padlet.com mayrams2505 https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2339951564 Democritus first said that everything in the world is made up of tiny particles surrounded by empty space. Democritus also speculated that the particles vary in shapes and sizes depending on the substance and he called these particles Atomos (which is now known as atoms)]]> 2022-10-14 06:51:38 UTC https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2339951564 mayrams2505 https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341817854 John Dalton combined the theories from Aristotle and from his own. He showed that common substances always broke down into the same element in the same proportions. John Dalton then concluded that various compounds were combinations of atoms of different elements which each having a particular size and mass]]> 2022-10-16 12:23:26 UTC https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341817854 mayrams2505 https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341823581 J.J Thompson discovered the electron, he showed atoms as packed spheres of positive matter filled with negatively charged electrons. He stated that if an atom had more positive mass then the atom would be positively charged and if an atom had more negative mass then it would be negatively charged.]]> 2022-10-16 12:34:52 UTC https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341823581 mayrams2505 https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341826123 Ernest Rutherford concluded that atoms consisted largely of empty space with just a few electrons and most of the mass was in the center which is the nucleus. The alpha particles passed through the gaps but then bounced back from the density of the positively charged nucleus. He also stated that the electrons surround the nucleus in an electron orbit.]]> 2022-10-16 12:39:35 UTC https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341826123 mayrams2505 https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341829719 Niels Bohr stated that electrons orbit the nucleus at fixed energy and distances and is able to jump from one level to another but isn't able to exist in the space between. ]]> 2022-10-16 12:45:42 UTC https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341829719 mayrams2505 https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341831373 Werner Heisenberg stated that it was impossible to determine the exact position and speed of electrons as they go around an atom. ]]> 2022-10-16 12:47:45 UTC https://padlet.com/mayrams2505/8e95zoz1ir3roqq/wish/2341831373