How to Draw the Lewis Structure of Nitrogen Dioxide (NO2)

TL;DR

To draw the Lewis structure of nitrogen dioxide (NO2), start with 17 valence electrons: nitrogen contributes 5 and each of the two oxygens contributes 6. The structure features nitrogen with seven electrons, resulting in a positive formal charge, while one oxygen carries a negative formal charge. Additionally, NO2 exhibits resonance, where the double bond can shift between the two oxygen atoms.

Transcript

in this video we're going to talk about how to draw the lewis structure of nitrogen dioxide no2 now the first thing we need to do as always is count the number of valence electrons in this molecule nitrogen has five valence electrons oxygen has six and it's two of them so we need to multiply that by two two times six is 12 12 plus 5 is 17. so we ha... Read More

Key Insights

• ❓ Nitrogen dioxide (NO2) has a total of 17 valence electrons.
• 🕖 The Lewis structure of NO2 has nitrogen with seven valence electrons and each oxygen with six valence electrons.
• 👔 Nitrogen maintains a positive formal charge in the Lewis structure of NO2.
• 🫀 Oxygen atoms in NO2 aim to have eight electrons around them, requiring two lone pairs each.
• 🫀 NO2 has a resonance structure where the double bond moves between the two oxygen atoms, while nitrogen maintains its positive formal charge.

Questions & Answers

Q: How many valence electrons does nitrogen dioxide (NO2) have overall?

Nitrogen dioxide has a total of 17 valence electrons.

Q: What determines the presence of a radical in the NO2 molecule?

The presence of an odd number of valence electrons in NO2 indicates the presence of a radical, specifically half of a lone pair on the central nitrogen atom.

Q: How many electrons does nitrogen aim to have around it in the Lewis structure of NO2?

Nitrogen aims to have eight electrons around it in the Lewis structure of NO2, but it can only achieve seven electrons due to the odd number of valence electrons.

Q: How many lone pairs does each oxygen atom in NO2 need to reach eight electrons around it?

Each oxygen atom in NO2 needs two lone pairs, or four electrons, to reach eight electrons around it.

Q: What are the formal charges of the nitrogen and oxygen atoms in NO2?

Nitrogen has a formal charge of +1, while one oxygen atom has a formal charge of 0 and the other oxygen atom has a formal charge of -1.

Q: How do you draw the resonance structure of NO2?

To draw the resonance structure of NO2, you can take a lone pair, form a pi bond, and break the pi bond while pushing the electrons onto another oxygen atom.

Summary & Key Takeaways

• Nitrogen dioxide (NO2) has a total of 17 valence electrons, with nitrogen having one electron on its central atom and oxygen having two.

• The Lewis structure of NO2 has nitrogen with seven valence electrons and each oxygen with six valence electrons.

• The molecule is a neutral molecule overall, but nitrogen has a positive formal charge and one oxygen has a negative formal charge.