https://padlet.com/abbypepper2626/w26hfxe7m74we5n4 en-us 2021-11-07 02:23:25 UTC 2021-11-07 02:56:12 UTC hello@padlet.com abbypepper2626 https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872177768 Leucippus and Democritus were two greek philosophers who believed that matter was composed of tiny particles that couldn't further be divided or split. They named these particles A Tomos which means indivisible. This was the first major idea that contributed to the Atomic Theory of atoms.]]> 2021-11-07 02:32:47 UTC https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872177768 abbypepper2626 https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872181107 Antoine Lavoisier discovered that matter could not be composed or destroyed in chemical reactions. The amount of mass of an element remains the same before and after the reaction has taken place. ]]> 2021-11-07 02:36:35 UTC https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872181107 abbypepper2626 https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872184084 John Dalton discovered that different elements are made of different types of atoms, as well as that all atoms of one element are the same. He realized that different atoms have different properties. ]]> 2021-11-07 02:41:49 UTC https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872184084 abbypepper2626 https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872187722 Eugene Goldstein simply discovered positive and negatively charged particles by using a cathode ray tube. 
JJ Thompson recognized these negatively charged particles and named them electrons. He also invented the plum pudding model, explaining that electrons were randomly distributed throughout a positively charged area.
Some years later, Earnest Rutherford discovered the nucleus of an atom using the gold foil experiment. He also concluded from the gold foil experiment that atoms are mostly empty space.

]]> 2021-11-07 02:48:26 UTC https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872187722 abbypepper2626 https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872192311 Niels Bohr was the inventor of the Bohr Model, which is used to show electrons in their orbits surrounding a nucleus. The model was flawed, as some elements have several electrons.
Heisenburg fixed this by creating the quantum theory, which uses different types of orbitals(the most likely area of an electron to be found). ]]> 2021-11-07 02:56:12 UTC https://padlet.com/abbypepper2626/w26hfxe7m74we5n4/wish/1872192311