History of the Atom by Bret Selfridge https://padlet.com/2465272/gba9z7v9zxr6zivj Block 2 en-us 2022-10-13 14:01:04 UTC 2022-10-13 14:59:21 UTC hello@padlet.com https://padlet-uploads.storage.googleapis.com/1846594594/8d32171cce1d9933693bff4c2d2e8f87/Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg John Dalton's Atomic Model 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338851832 - 1803 was when Dalton made his theory and model
- Discovered that everything consists of atoms
- created the idea that elements are characterized by the weight of their atoms]]> 2022-10-13 14:13:05 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338851832 J.J Thomson's Atomic Model 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338863779 - The model was made around 1904
- Called the Plum Pudding Model
- Each atom is filled with positively charged fluid ]]> 2022-10-13 14:19:16 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338863779 Ernest Rutherford's Atomic Model 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338870366 - Made around 1910 to 1911
- Called the planetary model
- Electrons orbit the nucleus]]> 2022-10-13 14:22:35 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338870366 Niels Bohr's atomic model 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338877258 - Made in 1913
- Called the Rutherford-Bohr model
- Electrons orbit the nucleus in a set path

]]> 2022-10-13 14:26:25 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338877258 Quantum Mechanical model 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338897465 - Proposed around 1926
- An electron doesn't travel an exact path
- The orbit is dependent on the energy level]]> 2022-10-13 14:37:50 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338897465 Cathode Ray Tube Experiment 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338910123 - Experiment was done by J.J Thomson in 1897
- Used to discover the electron
- Discovered that charged particles (electrons) are lighter than atoms]]> 2022-10-13 14:44:55 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338910123 Gold Foil Experiment 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338919806 - Experiment was done by Ernest Rutherford in 1908
- Used to find out that the atom is mostly empty space with a tiny, dense, positively-charged nucleus
- Almost all particles went through but some reflected back]]> 2022-10-13 14:50:09 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338919806 Bohr's Experiment with Hydrogen 2465272 https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338927039 - Experiment was done by Niels Bohr in 1913
- Used to show and support the planetary atom model
- Used to find out that electrons orbited the nucleus in specific orbits or shells with a fixed radius.]]> 2022-10-13 14:53:55 UTC https://padlet.com/2465272/gba9z7v9zxr6zivj/wish/2338927039