Question

What is the oxidation number of Nitrogen in HNO2?

+1
-1
+3
-3

Answer 1

@james238867

Answer 2

OK, so the rules for oxidation numbers are as follows:

1. The oxidation number for an atom of an element is 0.
2. The oxidation number for a monatomic ion is the same as its charge.
3. Fluorine is always assigned a –1 in compounds.
4. Oxygen is usually assigned a –2 in compounds.
5. Hydrogen is assigned a +1 in compounds with nonmetals.
6. The sum of oxidation numbers must equal the overall charge. For compounds, the overall charge is 0.

HNO2 has a zero charge. Therefore, the oxidation number of N must be (1-2(2)), or -3.

Answer 3

Is it A or D?
@james238867

Answer 4

D for -3.

Answer 5

ah, apologies, I was getting some water. miyagii is correct. the answer is D.

Answer 6

Would it not be positive?

Answer 7

i think its +3