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Wave Model/Quantum Mechanics (Modern Atom) 

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Wave Model/Quantum Mechanics (Modern Atom) 

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For a long time scientists were arguing over if electrons were either waves or particles, coming to a compromise that electrons are both waves and particles. The probable location of the electron is based on how much energy an electron has; atoms are also believed to be mostly empty space. Quantum wave mechanics are what made the modern model, which electrons are located in "clouds" or otherwise called "orbitals". When an electrons have lower energy they are closer to the nucleus, when electrons have more energy they are farther away from the nucleus. (notes) (picture)

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A video about the model created by Rutherford

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This video intrduces us to Rutherford's Model of an Atom. This is a product of Mexus Education Pvt. Ltd., an education innovations company based in Mumbai, India. http://www.mexuseducation.com, http://www.ikenstore.in

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Going off of JJ Thompson's theory Bohr claimed that electrons are placed on specific levels. These levels he called energy levels the orbited the nucleus.
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Rutherford and some students of his were using a gun that shoots alpha particles (Hydrogen Nucleus) at a very thin sheet of gold foil. While they tested this experiment most of the bullets went through the foil and hit a detector. Some bullets were also hit back the direction of the gun. After theorizing he had found the nucleus, the positive part of the atom, and changing the model that Thompson had created. (notes) (picture)

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JJ Thompson discovered the electron. He claimed that it was like Plum pudding because the plums are electrons and the rest are an atom. (notes) (image)

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Aristotle was a respected and powerful philosopher who disregarded Democritus theory. He said that all matter was made up of earth, water, fire, and air.
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John Dalton was the first person to ever experiment with atoms . He believed atoms looked like billiard balls, that atoms were indestructible, atoms of a same material are the exact same and that atoms from different atoms are different. Compounds were also thought to always contain the same portions of elements. (notes) (picture)

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Democritus was the one who first discovered the atom and called it atomos. He said they were small and all of them were different material. He compared it to a billiard ball small and hard. He claimed that they were infinite, always moving, and capable of joining together.
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