Unit 4 Review Sheet KEY

Unit 4 Review Sheet KEY - Name: _ Date: _ WKST #12: Unit 4...

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Name: _________________________________________ Date: ____________ WKST #12: Unit 4 Review Sheet Period: ___________ 1. Name 5 scientists and their contribution to atomic theory. Thomson – discovery of electron Millikan – charge of electron Rutherford – discovery of the nucleus Plank – energy is quantized Heisenberg – uncertainty of electron Pauli – no two electrons are identical Hund – electrons will fill up all orbitals in sublevel Bohr – planetary model of the atom Einstein – photoelectric effect 2. Complete the chart about the progression of atomic theory: Name of Model Model of Atom Why it Changed? Billiard Ball Atoms are indestructible spheres Discovery of the electron Plum Pudding Looks like a chocolate chip cookie – dough is positive, chocolate chips are negative Discovery of the nucleus Nuclear Electron cloud around a small, dense, positively charged nucleus Energy is quantized Bohr (Planetary) Protons and neutrons in
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Unit 4 Review Sheet KEY - Name: _ Date: _ WKST #12: Unit 4...

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