https://padlet.com/c20lschafer/fi4vk30kuy4uki7t en-us 2023-06-12 11:54:51 UTC 2025-04-24 10:46:11 UTC hello@padlet.com c20lschafer https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621072837 2023-06-12 12:01:44 UTC https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621072837 c20lschafer https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621072996 plum pudding model of the atom. In this model, the atom is a ball of positive charge with negative electrons embedded in it - like currants in a Christmas pudding.]]> 2023-06-12 12:01:59 UTC https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621072996 c20lschafer https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621075602 In 1909 Ernest Rutherford designed an experiment to test the plum pudding model. In the experiment, positively charged alpha particles were fired at thin gold foil. Most alpha particles went straight through the foil. But a few were scattered in different directions.


]]> 2023-06-12 12:05:39 UTC https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621075602 c20lschafer https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621075936 Niels Bohr adapted Ernest Rutherford's nuclear model. Bohr did calculations that led him to suggest that electrons orbit the nucleus in shells. The shells are at certain distances from the nucleus. The calculations agreed with observations from experiments.]]> 2023-06-12 12:06:09 UTC https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621075936 c20lschafer https://padlet.com/c20lschafer/fi4vk30kuy4uki7t/wish/2621076394 In 1932 James Chadwick found evidence for the existence of particles in the nucleus with mass but no charge. These particles are called neutrons. This led to another development of the atomic model, which is still used today.


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