https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2 Atoms are made up of three particles: Potons, Neutrons and Electrons. en-us 2023-02-09 11:04:33 UTC 2025-12-14 15:23:42 UTC hello@padlet.com https://padlet.net/icons/png/1f52c.png ramatoulayediallo3 https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483148671 He proposed that matter could not be divided into smaller pieces forever. He said that matter was made of small, hard particles that he called “atoms”. ]]> 2023-02-15 08:30:32 UTC https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483148671 ramatoulayediallo3 https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483151268 He created the very first atomic theory. 
All substances are made of atoms. Atoms are small particles that cannot be created, divided, or destroyed. Atoms are invisible.
Atoms join together to make new substances (molecules).]]> 2023-02-15 08:32:54 UTC https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483151268 ramatoulayediallo3 https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483155977 He discovered negatively charged particles inside the atom (electrons). ]]> 2023-02-15 08:37:25 UTC https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483155977 ramatoulayediallo3 https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483159346 He proposed that in the center of the atom is positively charged part called the nucleus. He discovered the protons and nucleus.]]> 2023-02-15 08:41:14 UTC https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483159346 ramatoulayediallo3 https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483161127 He improved on Rutherford's model. He proposed that electrons move around the nucleus in certain paths called energy levels. ]]> 2023-02-15 08:43:01 UTC https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483161127 ramatoulayediallo3 https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483164711 He proposed that electrons do not travel in definite paths around the nucleus.]]> 2023-02-15 08:46:04 UTC https://padlet.com/ramatoulayediallo3/m7uxgcagcn3j4du2/wish/2483164711