Valence Electrons and Lewis Structures

The video tutorial explains the process of drawing the Lewis structure for the peroxide ion, O2 2-. It begins by calculating the total number of valence electrons, which is 14, considering the two oxygen atoms and the extra electrons due to the ion's charge. The tutorial then demonstrates how to arrange the electrons to form bonds and complete the octets for each oxygen atom. Finally, it shows how to denote the ion's charge using brackets and a charge notation.

How many valence electrons does a single oxygen atom have?

• Ten

• Six

• Four

• Eight

What is the total number of valence electrons in the O2 2- Lewis structure?

• 18

• 12

• 14

• 16

How many electrons are used to form a single chemical bond between the two oxygen atoms?

• One

• Two

• Three

• Four

What is the significance of the brackets and -2 charge in the Lewis structure of O2 2-?

• It represents the number of oxygen atoms.

• It indicates the molecule is neutral.

• It denotes the presence of a double bond.

• It shows the molecule is an ion with a -2 charge.

What does it mean when an oxygen atom has an octet in its Lewis structure?

• It has 8 valence electrons.

• It has 6 valence electrons.

• It has 12 valence electrons.

• It has 10 valence electrons.