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WHO AM I?

WHO AM I?. Alex, Jerry, Tin Chemistry Group. How do we write the chemical formula of an ionic compound by given its name?. Confusion. How many kinds of and numbers of does one compound have? How many charge does one atom has?. Concept. Octet Rule

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WHO AM I?

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  1. WHO AM I? Alex, Jerry, Tin Chemistry Group

  2. How do we write the chemical formula of an ionic compound by given its name?

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

  4. Concept 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. Example Sodium Chloride? Na? Cl?

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

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

  8. Sodium Chloride 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. Sodium Chloride Na+ Cl- Happily Married

  10. Example Aluminum Oxide O? Al?

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

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

  13. Aluminum Oxide 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. Al3+ Periodic Table

  14. Aluminum Oxide O has 6 valence electrons and easier to gain 2 electron. O2- Periodic Table

  15. Aluminum Oxide 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. Aluminum Oxide Al23+ O32- happily Married again

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