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Slide 1 of 26 © Copyright Pearson Prentice Hall Models of the Atom > The Development of Atomic Models Rutherford’s atomic model could not explain the ___________ ___________ of elements. Rutherford’s atomic model could not explain why objects ______________ ___________ when _____________. 5.1

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Slide 2 of 26 © Copyright Pearson Prentice Hall Models of the Atom > The Development of Atomic Models The timeline shoes the development of atomic models from 1803 to 1911. 5.1

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Slide 3 of 26 © Copyright Pearson Prentice Hall Models of the Atom > The Development of Atomic Models The timeline shows the development of atomic models from 1913 to 1932. 5.1

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© Copyright Pearson Prentice Hall Slide 4 of 26 Models of the Atom > The Bohr Model Bohr proposed that an _____________ is found __________ in ____________ ______________ _____________, or _____________, around the nucleus. 5.1

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Slide 5 of 26 © Copyright Pearson Prentice Hall Models of the Atom > The Bohr Model Each possible electron orbit in Bohr’s model has a fixed energy. The fixed energies an electron can have are called ___________ ____________. A __________ of energy is the amount of energy required to _______ an __________ from _________ ________ ____________ to __________ __________ ___________. 5.1

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Slide 6 of 26 © Copyright Pearson Prentice Hall Models of the Atom > The Bohr Model Like the rungs of the strange ladder, the energy levels in an atom are not equally spaced. The higher the energy level occupied by an electron, the less energy it takes to move from that energy level to the next higher energy level. 5.1

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© Copyright Pearson Prentice Hall Slide 7 of 26 Models of the Atom > The Quantum Mechanical Model The quantum mechanical model determines the _________ ___________ an electron can have and how likely it is to find the electron in various _______________ around the nucleus. 5.1 The modern description of the electrons in atoms, the quantum mechanical model, comes from the mathematical solutions to the Schrödinger equation.

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Slide 8 of 26 © Copyright Pearson Prentice Hall Models of the Atom > The Quantum Mechanical Model The propeller blade has the same probability of being anywhere in the blurry region, but you cannot tell its location at any instant. The electron cloud of an atom can be compared to a spinning airplane propeller. 5.1

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Slide 9 of 26 © Copyright Pearson Prentice Hall Models of the Atom > The Quantum Mechanical Model In the quantum mechanical model, the probability of finding an electron within a certain volume of space surrounding the nucleus can be represented as a fuzzy cloud. The cloud is more dense where the probability of finding the electron is high. 5.1

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Slide 10 of 26 © Copyright Pearson Prentice Hall Models of the Atom > Atomic Orbitals An _______ ____________ is often thought of as a ________ of ___________ in which there is a ________ _________of __________ an _________________. Each energy _______________ corresponds to an orbital of a different _________, which describes where the electron is likely to be found. 5.1

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Slide 11 of 26 © Copyright Pearson Prentice Hall Models of the Atom > Atomic Orbitals Different atomic orbitals are denoted by letters. The s orbitals are spherical, and p orbitals are dumbbell-shaped. 5.1

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Slide 12 of 26 © Copyright Pearson Prentice Hall Models of the Atom > Atomic Orbitals Four of the five d orbitals have the same shape but different orientations in space. 5.1

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