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Oxidation Number

Oxidation Number. the combining ability of an atom (how many electrons it needs to gain or lose to be stable). How to find oxidation number : One step at a time!. 1. Find the number of valence electrons Example: Na is in column 1 so it has 1 valence electron.

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Oxidation Number

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  1. Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be stable)

  2. How to find oxidation number:One step at a time! • 1. Find the number of valence electrons • Example: Na is in column 1 so it has 1 valence electron

  3. How to find oxidation number:One step at a time! • 2. Decide the easiest way for the atom to get a full outer energy level. Remember: 8 is great, but for hydrogen, 2 electrons will do to get stable! • If an atom has 1, 2 or 3 valence electrons, it is easiest to give them away. • If it has more than 3 it is easiest for the atom to get some more to make it stable. • Example: Na has 1 valence electron so it is easiest to give it away.

  4. How to find oxidation number:One step at a time! • 3. Write the number of electrons the atom needs to give or get to become more stable. • Example: Na needs 1

  5. How to find oxidation number:One step at a time! • 4. Add the sign… • + if the atom gives away electrons • - if the atom gets electrons • Example: Na gives away so its number is 1+

  6. OXIDATION NUMBER PRACTICE Key: • Na _1+_B 3+ Cl1- K 1+ Mg 2+ • N 3- O 2- Br 1- Ca2+ Al 3+_ • P 3- Ne__0__ S 2- Li 1+ F 1-_ • H 1+ Al__3+__C 4+

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