06 Notes - Quantum Numbers

06 Notes - Quantum Numbers - Pluchino Regents Chemistry...

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Pluchino Regents Chemistry Atomic History & Electron Configuration 06 Quantum Numbers Aim: How do we describe the electrons of an atom? Do Now: What information is essential to describe the probable location of a given electron? In order to fully describe an electron you need to answer the following questions: Which energy level is the electron in? Which sublevel is the electron in? Which orbital is the electron occupying? Is the electron spin up or spin down? Quantum Numbers Every electron i n an atom will have a unique set of quantum numbers… [ n , l , m , s ] We can use these quantum numbers to express the most important pieces of information about the electron. Principle Quantum Number “n” Describes the energy level the electron is in Can have any integer value greater than or equal to 1 (usually 1, 2, 3, or 4) Azimuthal Number “ l Describes which sublevel the electron is in Can be any integer between 0 and n-1 o s = 0 o p = 1 o d = 2 o f = 3 Magnetic Number “m”
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