1. Alex, Jerry, Tin Chemistry Group

3. 1. How many kinds of and numbers of does one compound have? 2. How many charge does one atom has?

4. Octet Rule atoms tend to combine in such a way that they each have eight electrons in their valence shells, giving them the same electronic configuration as a noble gas Periodic Table

5. Sodium Chloride? Na? Cl?

6. 1. What are the atoms symbol? Sodium? Na. Chlorine? Cl. Periodic Table

7. 2. Determine the number of valence electrons. Na? 1 Cl? 7 Periodic Table

8. 3. Apply octet rule. Want to make 8 electrons 4. Determine the charge Na has 1 valence electron, it is more stable to lose 1 electron. Na + Cl has 7 valence electrons and easier to gain 1 electron. Cl - Periodic Table

9. Na + Cl - Happily Married

10. Aluminum Oxide Al? O?

11. 1. What are the atoms symbol? Aluminum? Al. Oxygen? Cl. Periodic Table

12. 2. Determine the number of valence electrons. Al? 3 O? 6 Periodic Table

13. 3. Apply octet rule. Want to make 8 electrons 4. Determine the charge Al has 3 valence electrons, it is more stable to lose 3 electrons than gain 5 electrons. Al 3+ Periodic Table

14. O has 6 valence electrons and easier to gain 2 electron. O 2- Periodic Table

15. Since O can gain only 2 electrons from Al, as a result, Al can still give up one more electron. There are second O to grab lost electron from Al. But now the second O only has 7 electrons and wants one more. It steals one more electrons from another Al. Now the second Al want to lose 2 more electrons which will be grabbed by the third O.

16. Al 2 3+ O 3 2- happily Married again

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