1. AP Chemistry Unit 2 – Atoms, Molecules, and, Ions
Day 6 – Unit 2 Quiz Review Day

2. Warm Up
Take out: unit 2 assignment sheet (if you don’t have one, get one from front of room)
Give yourself: A score on the completion of each assignment
BE READY: TO SHOW ME ITEMS IN ORDER
Time: 6 minutes
When done: LOOK THROUGH CALCULATING ENERGY SHEET (IN BLUE BIN) and attempt any questions
TIME: 4 MINUTES
WHEN DONE: Check your answers with your table partners

3. AP Chemistry Agenda
Emission spectrum and Planck’s Constant Practice (25 min)
HUND’S RULE AND AUFBAU PRINCIPLE (10 min)
Electron configuration and determining unpaired electrons (15 min)
Naming ionic compounds and covalent molecules (15 min)
Work time (20 min) – MAKE FLASHCARDS?
NEXT CLASS: KAHOOT

4. Calculating Energy, Frequency, and Wavelength
find: Hand out in the blue bin HIGHLIGHT OR CIRCLE: QUESTIONS YOU CAN DO Time: 3 minutes WHEN DONE: BE READY TO REVIEW ON DOCUMENT CAMERA

5. Aufbau principle, Hund’s rule, and determining unpaired electrons
Pauli’s exclusion Principle: No two electrons can have the same quantum number. Aufbau principle: Every electron will form to be the “most stable” electron configuration, meaning that electrons will fill orbitals in the lowest energy orbital first, before moving to a higher energy orbital. Hund’s rule: If multiple orbitals have the same energy, One electron goes in each, before they begin to “double up”.

6. Aufbau principle

7. Aufbau principle

8. Which of the rules does each electron diagram violate?B C
Pauli’s Exclusion: 1.34
A- violates Hund’s
B – Aufbau
C- Pauli’s Exclusion (n =1, l=0, m(l)=0, m(s)=1/2

9. Electron configuration
In atomic Physics and quantum chemistry is the distribution of electrons within atomic or molecular orbitals. s = 2 electrons p = 6 electrons d = 10 electrons f = 14 electrons

10. Electron configuration

11. Electron configuration

12. Electron configuration determining unpaired electrons
Electron configuration of Mg (#12)
1s22s23p64s2
HOW MANY UNPAIRED ELECTRONS ARE THERE?
NONE
Energy Level/Shell
# of e- in orbital
Type of orbital

13. Electron configuration determining unpaired electrons
Electron configuration of Ca (#20)
1s22s22p63s23p64s2
HOW MANY UNPAIRED ELECTRONS ARE THERE?
NONE
Electron configuration of Ti (#21)
1s22s22p63s23p64s23d1
ONE

14. Electron configuration determining unpaired electrons
Electron configuration of Ge (#32)
1s22s22p63s23p64s23d104p2
HOW MANY UNPAIRED ELECTRONS ARE THERE?
TWO
Electron configuration of Se (#34)
1s22s22p63s23p64s23d104p4

15. Electron configuration determining unpaired electrons
Electron configuration of W (#74)
_________
_________
SOMETHING LIKE THIS WOULD NOT BE ON AP EXAM WITHOUT AUFBAU DIAGRAM

16. Electron configuration determining unpaired electrons
NOBLE GAS configuration of W (#74)
NOBLE GAS CONFIGURATION:
SHORT HAND FOR ELECTRON CONFIGURATION
FIND NOBLE GAS BEFORE ATOMIC NUMBER
WRITE IN BRACKETS
CONTINUE ELECTRON CONFIGURATION
NOBLE GAS CONFIGURATION FOR: P, Ba,Cu

17. RULES FOR NAMING IONIC COMPOUNDS AND COVALENT MOLECULES
IONIC COMPOUNDS FORMULA: DETERMINED BY CHARGE OF ION RATIO IONIC COMPOUND NAME: DETERMINED BY NAME OF CATION AND ANION (ONLY MULTIVALENT GET ROMAN NUMERAL)

20. RULES FOR NAMING IONIC COMPOUNDS AND COVALENT MOLECULES
COVALENT MOLECULE FORMULA: DETERMINED BY PRE-FIX IN NAME COVALENT COMPOUND NAME: DETERMINED BY PRE-FIX ASSOCIATED WITH NUMBER IN FORMULA (EXCEPTION: IF FIRST ATOM HAS ONLY ONE ATOM IN FORMULA, THEN STAYS THE SAME) Time: 3 minutes WHEN DONE: BE READY TO REVIEW ON DOCUMENT CAMERA

22. WHAT WILL YOU NEED TO KNOW FOR UNIT 2
WHAT DO YOU NEED TO KNOW?
Calculate isotopes
Mass SpectroMETRY
Dalton’s laws
Empirical formulas AND NAMING COMPOUNDS
Electron configurations (AUFBAU, HUND’S RULE)
How to use Planck’s equation
How to use beer’s law and explain how to determine the concentration of a food Dye in a beverage
FROM Unit 1
Metric conversions
Write name or formula of IONIC compound
Memorize polyatomic ions
More from this unit on mid-term (Oct 16)

23. WORK TIME
use: the rest of class to review your notes (QUESTIONS IN MARGINS, CIRCLING KEY WORDS, SUMMARIES) Make: flash cards for covalent pre-fixes IF YOU HAVE A QUESTIONS, Ask: two or three, before me Time: 20 minutes When done: work on formal lab report (due by 11:59PM ON WED)