https://padlet.com/yekhamin/ux19or8rqpgw6tgo they are really small particles. en-us 2023-02-10 11:10:52 UTC 2023-02-14 10:43:37 UTC hello@padlet.com https://padlet.net/icons/png/1f9ec.png yekhamin https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481312928 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”. 

]]> 2023-02-14 09:30:55 UTC https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481312928 yekhamin https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481317466 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).

]]> 2023-02-14 09:32:08 UTC https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481317466 yekhamin https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481320823 He discovered negatively charged particles inside the atom (electrons). 

]]> 2023-02-14 09:33:00 UTC https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481320823 yekhamin https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481328783 He proposed that in the center of the atom is positively charged part called the nucleus. He discovered the protons and nucleus. 

]]> 2023-02-14 09:35:02 UTC https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481328783 yekhamin https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481332738 He improved on Rutherford's model. He proposed that electrons move around the nucleus in certain paths called energy levels. 

]]> 2023-02-14 09:36:05 UTC https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481332738 yekhamin https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481337745 He proposed that electrons do not travel in definite paths around the nucleus]]> 2023-02-14 09:37:23 UTC https://padlet.com/yekhamin/ux19or8rqpgw6tgo/wish/2481337745