1. Do Now Which answer represents a compound? 1. He 2. Br 3. NaCl 4. U Which answer represents a salt? 1. C 6 H 12 O 6 2. CaBr 2 3. Fe 4. CH 3 COOH

2. Williamsburg High School for Architecture and Design Mr. Quinn and Ms. Tom 11/13/13

3. Aim Can all atoms satisfy the Octet Rule?

4. Think Back… To the Octet Rule! All atoms must have 8 electrons in their outer shell What about the ones that don’t?

5. The Rules All elements want to look like noble gases They can either gain or lose electrons to get there

6. Ok, but which one? He: 2 Li: 2-1 Ne: 2-8

7. So where did the electrons go? Ar: 2-8-8 K: 2-8-8-1 Kr: 2-8-18-8 Ar: 2-8-8 Br: 2-8-18-7 Kr: 2-8-18-8

8. Practice, Round 1 Ne: 2-8 Mg: 2-8-2 Ar: 2-8-8 He: 2 O: 2-6 Ne: 2-8

9. Practice, Round 2 Kr: 2-8-18-8 Rb: 2-8-18-8-1 Xe: 2-8-18-18-8 Kr: 2-8-18-8 I: 2-8-18-18-7 Xe: 2-8-18-18-8

10. How about some molecules? He: 2 C: 2-4 Ne: 2-8 Si: 2-8-4 Ar: 2-8-8

12. From Yesterday… Stealing electrons forms a. Sharing electrons forms a.

13. Examples of Molecules:

14. Regents Practice, Round 1 Which symbol represents an atom in the ground state with the most stable valence electron configuration? 1. B 2. O 3. Li 4. Ne

15. Regents Practice, Round 2 Which substance contains bonds that involved the transfer of electrons from one atom to another? 1. CO 2 2. NH 3 3. KBr 4. Cl 2

16. Regents Practice, Round 3 When sodium and fluorine combine to produce the compound NaF, the ions formed have the same electron configuration as atoms of 1. argon, only 2. neon, only 3. both argon and neon 4. neither argon nor neon