Lewis Structure and Valence Electrons

The video tutorial explains the process of drawing the Lewis structure for the HCO2- ion. It begins by identifying the total number of valence electrons and placing hydrogen, carbon, and oxygen atoms accordingly. The tutorial then details how to distribute electrons to form chemical bonds, ensuring each atom achieves a full outer shell. Special attention is given to sharing electrons to complete carbon's octet. The video concludes by checking formal charges and illustrating the ion's representation with brackets and a negative sign.

What is the total number of valence electrons in the HCO2- Lewis structure?

• 16

• 20

• 22

• 18

Which atom is placed at the center of the HCO2- Lewis structure?

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

How many valence electrons are used to form chemical bonds initially?

• 6

• 8

• 4

• 2

What adjustment is made to ensure Carbon has a full octet?

• Add more electrons

• Form a double bond

• Remove electrons

• Add a new atom

After forming a double bond, how many valence electrons does Carbon have?

• 6

• 7

• 8

• 9

What is the formal charge of the Oxygen atom with a negative charge?

• -1

• -2

• 0

• +1

What should be added to the Lewis structure to indicate it is an ion?

• Both brackets and a negative sign

• Brackets

• A negative sign

• A positive sign