S10_Lec7N

S10_Lec7N - CHM 11500 Lecture 7, 06-24-10 Atomic Structure...

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CHM 11500 Lecture 7, 06-24-10 Atomic Structure Reading: Chapter 6 and 7
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Bohr’s Planetary model Bohr model uses “Bohr orbits” to describe the physical motion and  positions of electrons. This model fails to explain various characteristics of atoms and atom  behavior, including bonding and periodicity
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Quantum Mechanical model Better model than Bohr – is able to  accurately explain and predict what we  currently know about electron and atom  behavior and characteristics. Uses Quantum Mechanical “orbitals” instead of Bohr “orbits” (flat circles)
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What is a Quantum Mechanical Orbital? A mathematical function ( Ψ , called Psi) from which  we can determine different properties of  electrons. Among these properties:  energies of the electrons spatial distribution ( where  you find the  electrons)
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Orbital? Electron energy: 
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S10_Lec7N - CHM 11500 Lecture 7, 06-24-10 Atomic Structure...

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