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Science C1 (Compounds (Atoms join together to make compounds, Formed from…
Science C1
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Atoms
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Made of Protons, Neutrons (Nucleus) and Electrons
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Mass Number = Mass of Nucleus, Atomic Number = Amount of Protons
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History of the Atom
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1897: JJ Thompson concluded Atoms were not solid spheres and contained electrons. He came up with the Plum Pudding Model
1909: Ernest Rutherford's Gold Foil Experiment concludes that atoms are made of a solid nucleus with a could of electrons surrounding it
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Elements
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Different elements have different number of Protons, Neutrons and Electrons
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Isotopes
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RAM (Relative Atomic Mass) is the average mass of all the masses and abundances of all isotopes that make up an Element
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Electronic Structure
Electron numbers are limited by the shell they are in: 2,8,8,2
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