https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz They are really small (tiny) particles. They are so small that we cannot see them our eyes en-us 2023-02-10 11:06:07 UTC 2023-02-14 09:34:32 UTC hello@padlet.com https://padlet.net/icons/png/1f4a1.png kaoutarhajji https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476275740
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”. 

]]> 2023-02-10 11:12:25 UTC https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476275740 kaoutarhajji https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476281182 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).

]]> 2023-02-10 11:18:12 UTC https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476281182 kaoutarhajji https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476282232 He discovered negatively charged particles inside the atom (electrons). 

]]> 2023-02-10 11:19:23 UTC https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476282232 kaoutarhajji https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476283373 He proposed that in the center of the atom is positively charged part called the nucleus. He discovered the protons and nucleus. 

]]> 2023-02-10 11:20:34 UTC https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476283373 kaoutarhajji https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476284319 He improved on Rutherford's model. He proposed that electrons move around the nucleus in certain paths called energy levels. 

]]> 2023-02-10 11:21:36 UTC https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476284319 kaoutarhajji https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476285058 He proposed that electrons do not travel in definite paths around the nucleus.

]]> 2023-02-10 11:22:24 UTC https://padlet.com/kaoutarhajji/wylwsl0wq33jkxkz/wish/2476285058