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Amber and Fur (Static Electricity)
First to Invesitgate the basic principles of the atom
NO EVIDENCE -
Cutting the Cheese Thought Experiment
Thinks of the atom -
Just a ball
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Did not believe in the atom.
Thought it put a resriction on the Gods. FIRE, AIR, WATER, EARTH -
Matter is made up of atoms
Together by attractions/forces -
Atomic Theory Experiment
1) all matter is made up of tiny particles called atoms
2) all atoms of a given element are alike, different for different types of elements
3) compounds are formed when atoms of different elements combine in fixed proportions
4) chemical reaction is a rearragment of atoms, but the atoms themselves do not change EXPERIMENTAL EVIDENCE -
Exposed Uranium to Sunlight
Discovers Radioactivity
Didnt know why, but he knew it happened -
Cathode Ray experiment
Discovers electron because he realizes atoms carry charge PLUM PUDDING MODEL -
scattered protons and electrons, looks like plum pudding
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Oil Drip Experiment
Discovers Charge of a single electron -
Electrons have specific orbits
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specific orbits
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Gold Foil Experiment
Nucleus is in the center, electron are tiny and orbit
New atomic model -
particles through thin gold sheet, some diflect
Discovers Nucleus -
Nuceus, electrons surrounding
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Identified Isotopes by finding masses of the same atom.
Mass Spectograph -
Took the Bohr Atomic Model further.
Finds the probability of an electron in a certain orbit.
Odds of the elctrons position, not path. -
Shaded darker for higher probability of electrons
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Nuetrons are added to the nucleus.
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Discovered Neutrons
