Review for Tomorrow’s Quiz

1. Review for Tomorrow’s Quiz Topics: Isotopic Notation, Atomic Mass Calculation, and Energy Calculations • Isotopic Notation Review: • How many protons, neutrons, and electrons are in the follow atom? • 3115P-3 • Write the isotopic notation to represent: 20 protons, 22 neutrons, and 18 electrons. • Define isotope. • Atomic Mass Review: • What is the atomic mass of hafnium if, out of every 100 atoms, 5 have a mass of 176, 19 have a mass of 177, 27 have a mass of 178, 14 have a mass of 179, and 35 have a mass of 180.0? • Energy Calculation Review: • If the energy is 7.3x10-15 J, what are the wavelength and frequency of the wave? • If the wavelength of a wave is 450 nm, what is the energy of the wave?

2. CONVERSATION STARTER Chem-to-go Lesson 8: Quantum Mechanical Model Materials: Quantum mechanical model video notes and color-coded periodic table Clean sheet of paper for electron configuration notes Pencil

3. Acquisition of Knowledge Three Hotel Managers: Aufbau: Each room/bed on the lower floors must be occupied before moving to a higher floor. Pauli: A maximum of two guests may occupy a bed. Guests must sleep head to foot. Hund: Single guests must occupy separate beds in a room. No pairing occurs unless no empty beds exist. An analogy – Hotel Tarvin Four Types of Rooms: “S” rooms = Single room – 1 bed = no more than 2 guests “P” rooms = Prestige room - 3 beds = no more than 3 guests “D” rooms = Deluxe room - 5 beds = no more than 10 guests “F” rooms = Fabulous room – 7 beds = no more than 14 guests Students will acquire knowledge in an unpredictable situation.

4. Assimilation of Knowledge Hotel Blueprint 5s 4p 3d Example 1: Oxygen 4s Configuration: 3s 3p Aufbau: Each room/bed on the lower floors must be occupied before moving to a higher floor. Pauli: A maximum of two guests may occupy a bed. Guests must sleep head to foot. Hund: Single guests must occupy separate beds in a room. No pairing occurs unless no empty beds exist. 2p 2s 1s Students will apply knowledge to a real-world situation.

5. Assimilation of Knowledge Hotel Blueprint 5s 4p 3d Example 2: Magnesium 4s Configuration: 3s 3p Aufbau: Each room/bed on the lower floors must be occupied before moving to a higher floor. Pauli: A maximum of two guests may occupy a bed. Guests must sleep head to foot. Hund: Single guests must occupy separate beds in a room. No pairing occurs unless no empty beds exist. 2p 2s 1s Students will apply knowledge to a real-world situation.

6. Assimilation of Knowledge Hotel Blueprint 5s 4p 3d Example 3: Iron 4s Configuration: 3s 3p Aufbau: Each room/bed on the lower floors must be occupied before moving to a higher floor. Pauli: A maximum of two guests may occupy a bed. Guests must sleep head to foot. Hund: Single guests must occupy separate beds in a room. No pairing occurs unless no empty beds exist. 2p 2s 1s Students will apply knowledge to a real-world situation.

7. Assimilation of Knowledge • KEY IDEA: The periodic table allows us to predict the electron configuration of each atom if we simply follow the 3 rules. • Teacher-led: Now, let’s use your labeled periodic table to write the electron configuration for the same three elements plus one more. • Oxygen • Magnesium • Iron • Bromine • Partner Practice: Now it’s your turn! Write the electron configuration for the following elements: • Neon • Sulfur • Zinc • Arsenic

8. Assimilation of Knowledge • KEY IDEA: The periodic table allows us to predict the electron configuration of each atom if we simply follow the 3 rulesAND we know what the letters and numbers of the configuration mean! • Coefficients = energy levels • Letters (s,p,d,f) = sublevels or shapes of cloud • S = sphere • P = figure eight • D and F = hybrid axes that you are NOT responsible for knowing • Superscripts = electrons

9. Assimilation of Knowledge • Coefficients = energy levels • Letters (s,p,d,f) = sublevels or shapes of cloud • S = sphere • P = figure eight • D and F = hybrid axes that you are NOT responsible for knowing • Superscripts = electrons Important information about an atom’s electrons: Number of electrons Number of energy levels Number of valence electrons

10. Assimilation of Knowledge • Noble Gas Notation: Useful abbreviation of electron configuration • Steps for Writing Noble Gas Notation: • Find the last noble gas BEFORE the element • Write the noble gas in brackets [ ]. • Write the electron configuration from the noble gas to the element.