History of the atom by Maryia Basko https://padlet.com/maryiab/ce7ap4uaf6hrxntk en-us 2023-10-03 13:23:10 UTC 2023-10-04 22:54:36 UTC hello@padlet.com Democritus (~400BCE) maryiab https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2730269505 ~The atom was made by Democritus around 400BCE.  
~He believed that matter is made of tiny indivisible particles 
~His discovery was not based on any scientific evidence, it was more like idea
 ]]> 2023-10-03 13:37:34 UTC https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2730269505 Billiard Ball Model maryiab https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732814077 ~ The model was made by John Dalton in 1803
~He believed that the atoms of the same element are the same size and mass and the atoms of different elements have different masses/sizes 
~Also atoms are indivisible ]]> 2023-10-04 22:07:10 UTC https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732814077 Plum Pudding Model maryiab https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732818416 ~The model was made by J.J. Thomson in 1897
~ He believed that the atoms are made of small negative charges, the electrons, that floating in a "sea" of positive matter]]> 2023-10-04 22:14:20 UTC https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732818416 Nuclear Model maryiab https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732834270 ~The model was made by Ernest Rutherford in 1911
~His model participated in "The Gold Foil Experiment". ]]> 2023-10-04 22:41:03 UTC https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732834270 Planetary Model maryiab https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732838738 ~ The model was made by Niels Bohr in 1913
~His models is similar to Rutherford's model
~ Electrons in Bohr's model were positioned in predictable circular orbit
~The closer the electrons are to the nucleus, the less energy they have]]> 2023-10-04 22:49:02 UTC https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732838738 Wave Mechanical Model maryiab https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732841536 ~ The model was created in 1926
~Electrons exist in orbital 
~Orbital are regions where electrons are most likely to be found ]]> 2023-10-04 22:53:41 UTC https://padlet.com/maryiab/ce7ap4uaf6hrxntk/wish/2732841536