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All matter is made up of water, earth, air & fire
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Known as The Laughing Philosopher
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Atoms are indivisible, indestructible, in motion & differs in shapes and sizes
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Billiard Ball Model / Solid Sphere Model
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Atoms can't be destroyed, subdivided or created
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Atoms of the same element have identical properties; Atoms from different elements have different properties
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During chemical reactions, atoms can be rearranged, separated or created
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Atoms are combined in simple whole number ratios
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Plum Pudding Model
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Discovered that electrons are stuck in a positively charged matter
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Conducted the cathode-ray experiment; Beta particles were attracted to the positively charged magnets
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Nuclear Model / Rutherford's Model
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Dense, tiny positively charge in the centre of an atom
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Several spaces in an atom
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Most of the mass is in the nucleus
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If J.J Thompson's discovery was accurate, the particles would've had minor deflects, but there were major deflects
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Gold foil was used b/c it is the most malleable metal
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Planetary Model / Bohr's Model
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Electrons emit photons (quantum of light) jumps up or down to other shells and doesn't spiral into the nucleus while emitting photons
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Proposed that particles can emit a certain amount of electromagnetic radiation
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Electrons need to obtain the amount of energy before emitting it
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Analogy: Similar to a bank machine...you can only receive multiple of $20.00, although other amounts exit (e.g. $32.00)
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It's impossible to know both the position (location) & the momentum (speed) of a particle at any given moment
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Quantum Mechanical Model
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Mathematically predicted the regions of space where electrons can be found
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Quantum Mechanical Model
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Electrons behave like waves & particles
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Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
