NO2- Lewis Structure and Valence Electrons

The video tutorial explains the process of drawing the Lewis structure for the nitrite ion (NO2-). It begins by calculating the total valence electrons, positioning the atoms, and distributing the electrons to form chemical bonds. The tutorial then addresses the need to satisfy the octet rule by forming a double bond. Finally, it checks the formal charges and emphasizes the importance of using brackets to indicate the ion's negative charge.

How many total valence electrons are present in the NO2- ion?

• 18

• 22

• 16

• 20

Which atom is placed at the center of the NO2- Lewis structure?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon

How many valence electrons are initially used to form chemical bonds between the atoms in NO2-?

• 2

• 8

• 4

• 6

What adjustment is made to ensure the central nitrogen atom satisfies the octet rule?

• Add more electrons to nitrogen

• Add a hydrogen atom

• Remove electrons from oxygen

• Form a double bond with oxygen

After adjusting the electron distribution, how many valence electrons does the central nitrogen atom have?

• 9

• 8

• 7

• 6

What is the formal charge on the oxygen atom with a double bond in the NO2- structure?

• -1

• +1

• -2

• 0

Why are brackets used around the NO2- Lewis structure?

• To highlight the central atom

• To show it is an ion

• To denote resonance

• To indicate it is a molecule