Oxidation Numbers and Nitrogen Dioxide

The video tutorial explains how to determine the oxidation number of nitrogen in nitrogen dioxide (NO2). It clarifies that NO2 is a neutral compound, not an ion, and discusses how the oxidation numbers of its elements add up to zero. Oxygen is typically -2, and with two oxygens, the total is -4. To balance this, nitrogen must be +4. The video also demonstrates an algebraic method to calculate the oxidation number, confirming that nitrogen's oxidation number in NO2 is +4.

What is the chemical formula for nitrogen dioxide?

• NO2

• N2O

• N2O5

• NO3

Why is NO2 not considered an ion?

• It is a polyatomic ion.

• It has a positive charge.

• It has a negative charge.

• It is neutral with no charge.

What is the typical oxidation state of oxygen in compounds?

• +2

• 0

• -1

• -2

How do the oxidation numbers in a neutral compound like NO2 add up?

• They add up to a negative number.

• They add up to a positive number.

• They add up to the number of atoms.

• They add up to zero.

If the oxidation number of oxygen is -2, what is the total contribution of two oxygen atoms in NO2?

• +2

• -2

• -4

• +4

What algebraic expression can be used to find the oxidation number of nitrogen in NO2?

• x - 4 = 0

• x + 2 = 0

• x + 4 = 0

• x + (-4) = 0

What is the oxidation number of nitrogen in NO2?

• +4

• +3

• +5

• +2