Oxidation States and Numbers

The video explores the oxidation numbers of nitrogen, highlighting its common states: -3, +3, and +5. It explains that nitrogen, when in a chemical equation, often appears as N2 due to its diatomic nature. The video discusses how free elements like N2 have an oxidation number of zero. It further examines the oxidation numbers in compounds like NH3, where hydrogen is +1, making nitrogen -3. Additional examples include NF3 and nitric acid, illustrating nitrogen's oxidation states of +3 and +5, respectively. The video concludes with a recap of these oxidation states.

What are the most common oxidation states of nitrogen?

• -3, +3, +5

• -1, +1, +3

• 0, +2, +4

• -2, +2, +4

In chemical equations, how does nitrogen typically appear?

• As a single atom

• As N2

• As N3

• As a free radical

What is the oxidation number of nitrogen in NH3?

• 0

• -3

• +3

• +5

When hydrogen is bonded with nonmetals, what is its typical oxidation state?

• 0

• +2

• +1

• -1

In NF3, what is the oxidation state of fluorine?

• -1

• +1

• 0

• +3

What is the oxidation number of nitrogen in NF3?

• -3

• +3

• 0

• +5

In nitric acid, what is the oxidation state of nitrogen?

• 0

• +5

• -3

• +3

What is the typical oxidation state of oxygen in compounds?

• -2

• +1

• 0

• +2

Which of the following is a free element with an oxidation number of zero?

• N2

• HNO3

• NH3

• NF3

What is the sum of oxidation numbers in a neutral compound?

• Always positive

• Depends on the compound

• Always negative

• Zero