https://padlet.com/chejahmed/av8i445tico09z8x Atoms are made up of three particols protoms neutrons and eletrons. en-us 2023-02-09 11:07:10 UTC 2023-02-15 08:56:00 UTC hello@padlet.com https://padlet.net/icons/png/269b.png chejahmed https://padlet.com/chejahmed/av8i445tico09z8x/wish/2474853395 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”. ]]> 2023-02-09 11:22:42 UTC https://padlet.com/chejahmed/av8i445tico09z8x/wish/2474853395 chejahmed https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483144099 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 08:25:43 UTC https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483144099 chejahmed https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483144981 He discovered negatively charged particles inside the atom (electrons). 

]]> 2023-02-15 08:26:37 UTC https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483144981 chejahmed https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483145934 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 08:27:33 UTC https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483145934 chejahmed https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483146983 He improved on Rutherford's model. He proposed that electrons move around the nucleus in certain paths called energy levels. 

]]> 2023-02-15 08:28:43 UTC https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483146983 chejahmed https://padlet.com/chejahmed/av8i445tico09z8x/wish/2483147602 He proposed that electrons do not travel in definite paths around the nucleus.

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