Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be...
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Transcript of Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be...
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Oxidation Number
the combining ability of an atom
(how many electrons it needs to gain or lose to be
stable)
![Page 2: Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be stable)](https://reader033.fdocuments.net/reader033/viewer/2022051621/5697bf8e1a28abf838c8d150/html5/thumbnails/2.jpg)
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
![Page 3: Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be stable)](https://reader033.fdocuments.net/reader033/viewer/2022051621/5697bf8e1a28abf838c8d150/html5/thumbnails/3.jpg)
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 4 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.
![Page 4: Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be stable)](https://reader033.fdocuments.net/reader033/viewer/2022051621/5697bf8e1a28abf838c8d150/html5/thumbnails/4.jpg)
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
![Page 5: Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be stable)](https://reader033.fdocuments.net/reader033/viewer/2022051621/5697bf8e1a28abf838c8d150/html5/thumbnails/5.jpg)
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+
![Page 6: Oxidation Number the combining ability of an atom (how many electrons it needs to gain or lose to be stable)](https://reader033.fdocuments.net/reader033/viewer/2022051621/5697bf8e1a28abf838c8d150/html5/thumbnails/6.jpg)
OXIDATION NUMBER PRACTICE Key:
• Na _1+_ B 3+ Cl 1- K 1+ Mg 2+
• N 3- O 2- Br 1- Ca 2+ Al 3+_
• P 3- Ne__0__ S 2- Li 1+ F 1-_
• H 1+ Al__3+__ C 4+