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25 Cards in this Set
- Front
- Back
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All matter is indivisible
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Dalton
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Atoms of different elements have different masses
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Dalton
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Chemical elements are made up of atoms
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Dalton
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The atoms of an element are identical in their masses
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Dalton
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Atoms only combine in small, whole number ratios such as 1:1, 1:2, 2:3 and so on
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Dalton
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Gold Foil experiment
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Rutherford
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Small positively charged dense nucleus
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Rutherford
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Proved existence of the nucleus
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Rutherford
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The atom is mostly empty space
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Rutherford
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Alpha particles were deflected back
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Rutherford
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Electrons are outside the nucleus
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Rutherford
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1st Planetary Model
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Rutherford
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Plum Pudding Model
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Thomson
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Cathode ray experiment
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Thomson
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Discovered electrons
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Thomson
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Electrons are embedded all through the atom
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Thomson
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2nd Planetary Model
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Bohr
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Electrons orbit in energy levels
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Bohr
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Protons and neutrons in nucleus
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Bohr
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Atom looks like the solar system with electrons circling the nucleus
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Bohr
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Also called Cloud
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Modern
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The precise location of an electron cannot be known
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Modern
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2-8-18-32
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Modern
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Only the probable location of an electron is possible
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Modern
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2N ^2
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Modern
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