# Question #f6f9a

##### 1 Answer

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#### Explanation:

**Recall: The following rules for assigning oxidation numbers**

Credit: Tyler DeWitt

Keeping those rules In mind, let's look at each compound:

**neutral (meaning the compound has no charge) compound is equal to 0** The sum of the is zero since

With oxidation numbers Sodium Chloride

Now looking at

O (Oxygen) has an oxidation of

Thus far we have:

**Remember: the sum of of O.N's in a neutral compound is #0#**

Therefore

For **diatomic molecule** which is a molecule that consists of two atoms from the same element like (**an element by itself has an O.N of #0#**

Lastly:

This one is interesting because this is known as a polyatomic ion.

"O" has an O.N of

To determine the O.N of chlorine we must keep in mind the sum of O.N's is **NOT ZERO**. In this case the sum it is equal to the **ion charge**

So: Chlorine would have an O.N of

I hope this helped, but if you're still stuck or if you need a better explanation of this concept, check out the video below (I bet he can explain it way better than me!):