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April 1, 2024
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Chem
è stata creata
John Sakoutis
⟶ è stato aggiornato 27 ott 2019 ⟶
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Eventi
. John Dalton + Discovered "Indivisible" Atoms + Claimed all elements had their own atom
. J.J Thomson + Found that atoms were divisible and contained electrons - His model had no nucleus
. Ernest Rutherford + Discovered a positive charge in nucleus + Stated most of an atom is empty space +Electrons orbited
. Erwin Schrödinger + Claims electrons are waves and make a cloud around the nucleus + Found that it is impossible to determine the position of an electron + Found "Clouds of probability" where it is more likely to find an electron + Most accurate model
Periodi
Cathode rays were discovered by Julius Plücker and Johann Wilhelm Hittorf. By placing a charge across a glass tube with a vacuum inside and a phosphor coating outside, it was possible to get a bright glow. Electron travels in straight lines and leave shadows. If the cathode rays hit a paddle with a phosphor coating, it would force the paddle to move signifying that cathode rays are particles