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Quantum Mechanical Model

Quantum Mechanical Model. Chem -To-Go Lesson 8 Unit 2. You’ll need a periodic table, FOUR different colors, and a pen or pencil to make the labels. Press PAUSE and collect your materials. SIMPLIFIED QUANTUM MECHANICAL MODEL. Current model of the atom

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Quantum Mechanical Model

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  1. Quantum Mechanical Model Chem-To-Go Lesson 8 Unit 2 You’ll need a periodic table, FOUR different colors, and a pen or pencil to make the labels. Press PAUSE and collect your materials.

  2. SIMPLIFIED QUANTUM MECHANICAL MODEL • Current model of the atom • Extremely organized model describing much electron motion • Electron organization • Electron cloud • Energy levels • Sublevels • Orbitals • Spin • Unlock the model in class tomorrow

  3. Preparing to understand • We’ll learn to describe the motion and organization by using the periodic table. Labeling the table is helpful. • First, we’ll number the rows on the periodic table. 1 2 3 4 5 6 7

  4. Preparing to understand • Second, we’ll add the row numbers to a few additional spots. • It can get a little crowded, but you’ll be OK. 1 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 4 5

  5. Preparing to understand • Third, we’ll move the Helium block over next to Hydrogen. • NO NEED TO COLOR HELIUM YET…the yellow is just for emphasis. Note that the old Helium block is now gone. 1 He 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 4 5

  6. Preparing to understand • Next, we’ll shade a few areas on the periodic table. • Choose one color, and lightly shade the area shown below. • We’ll call this area the “s block” of the table. 1 He 2 2 Choose a couple of elements and spell a word! 3 3 3 4 4 4 5 5 5 6 6 6 7 4 5

  7. Preparing to understand • Choose a second color, and lightly shade the area shown below. • We’ll call this area the “p block” of the table. 1 He 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 4 5

  8. Preparing to understand • Choose a third color, and lightly shade the area shown below. • We’ll call this area the “d block” of the table. 1 He 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 4 5

  9. Preparing to understand • Use the fourth color to lightly shade the area shown below. • We’ll call this area the “f block” of the table. 1 He 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 4 5

  10. Three Important Rules to Know • aufbau Principle: Each orbital and sublevel on the lower energy levels must be occupied before moving to a higher energy level. • Pauli Exclusion Principle: A maximum of two electrons may occupy an orbital. Paired electrons must spin oppositely. • Hund’s Rule: Single electrons must occupy separate orbitals in a sublevel. No pairing occurs unless no empty orbitals exist in the sublevel.

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