https://padlet.com/201022037/75aqu2lkwi7dpn1z en-us 2020-11-18 15:16:58 UTC 2025-10-14 20:13:28 UTC hello@padlet.com 201022037 https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/937176168 In ancient Greece two philosophers Democritus and Leucippus created a theory that matter was not divisible into smaller particles but was actually made up by indivisible particles called atoms]]> 2020-11-18 15:29:48 UTC https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/937176168 201022037 https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942050887 An englishman by the name of Joseph Priestley discovered oxygen gas among other things and made many advances in chemistry and atomic sciences ]]> 2020-11-19 16:14:31 UTC https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942050887 201022037 https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942073957 Regarded as the "father of modern chemistry", Antoine Lavoisier was a french chemist who famously discovered the law of conservation mass. This declared that in any chemical reaction, the mass of the substances that react equals the mass of the products that are formed.]]> 2020-11-19 16:18:37 UTC https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942073957 201022037 https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942148561 English schoolteacher John Dalton used the findings of many other chemists to suggest that elements consisted of invisible particles he called the atoms. He created an atomic theory of matter that is the basis for atomic sciences today. ]]> 2020-11-19 16:32:20 UTC https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942148561 201022037 https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942210968 French chemist Joseph Gay-Lussac did a number of experiments with different gases and found that some reacted together to form chemical compounds which was the gateway to many chemical and atomic discoveries ]]> 2020-11-19 16:43:09 UTC https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942210968 201022037 https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942376881 https://2012books.lardbucket.org/books/principles-of-general-chemistry-v1.0/s05-04-a-brief-history-of-chemistry.html]]> 2020-11-19 17:12:50 UTC https://padlet.com/201022037/75aqu2lkwi7dpn1z/wish/942376881