Lecture 15 (10am) Chapter 7 and Chapter 8 October 23 2009

Lecture 15 (10am) Chapter 7 and Chapter 8 October 23 2009 -...

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Reminder: Exam 2 on Wednesday October 28 will cover Chapters 5, 6 and 7.1-7.3 (the first three sections of Chapter 7) Bring a number 2 pencil and a scientific calculator (no graphing calculators) Chemistry Supplemental Instruction Session: Tuesday 10/27 from 8-10pm in DCC 318
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Chapter 7 continued (Section 7.4) Lecture 15 October 23, 2009
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Atomic Orbitals: Probable location of electrons
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Atomic orbitals developed using quantum mechanics (A) describe regions of space in which one is most likely to find an electron. (B) describe exact paths for electron motion. (C)give a description of the atomic structure which is essentially the same as the Bohr model. (D)allow scientists to calculate an exact volume for the hydrogen atom. (E) are in conflict with the Heisenberg Uncertainty Principle.
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Quantum Numbers: n, l, m l , m s
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Principle Quantum Number Positive Integer (1, 2, 3, …) Indicates relative size of orbital Specifies energy level of the atom
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Angular Momentum Quantum Number: An Integer from 0 to (n-1) Related to shape of orbital
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Unformatted text preview: Principle quantum number (n) sets limit on values of l Magnetic Quantum Number Integer from Defines the orientation of the orbital in the space around the nucleus Angular momentum quantum number sets the possible values of m l Example: What are the values of l and m l allowed for n = 6? Spin Quantum Number: m s Property of electron itself spin (intrinsic property) Value of either + or - Which of the following is a correct set of quantum numbers for an electron in a 5p orbital? A. n = 5, l = 0, m l = 0, m s = - B. n = 5, l = 1, m l = 2, m s = + C. n = 5, l = 2, m l = 1, m s = - D. n = 5, l = 1, m l = 0, m s = - E. n = 5, l = 1, m l = -1, m s = +1 In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed? (A)a. (B)b. (C)c. (D)d. (E) e. Shapes of atomic orbitals: s Shapes of atomic orbitals: p Shapes of atomic orbitals: d Chapter 8 Exclusion Principle Electrostatic effects and Energy level splitting...
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This note was uploaded on 10/22/2011 for the course CHEM 1200 taught by Professor Mcintosh during the Spring '08 term at Rensselaer Polytechnic Institute.

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Lecture 15 (10am) Chapter 7 and Chapter 8 October 23 2009 -...

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