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Nitrogen is more electronegative than Hydrogen.

So +1 for each hydrogen and -3 for nitrogen

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Q: Does NH3 has an oxidation number od -1?
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Related questions

What is the oxidation number of N3H?

Assuming you mean NH3 since there is no N3H ....The charge on NH3 is zero; it doesn't have an oxidation number. The oxidation number of N in NH3 is 3- The oxidation number of each H in NH3 is 1+


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