I3- Ion Structure and Properties

Dr. B explains how to draw the Lewis structure for the I3- ion. Starting with the valence electrons of Iodine, he calculates the total valence electrons for the ion, including the extra electron due to the negative charge. He then arranges the Iodine atoms and forms chemical bonds, ensuring all electrons are accounted for. Dr. B checks the formal charges to confirm the best Lewis structure, ensuring the charges align with the ion's overall charge. The video concludes with a finalized Lewis structure for I3-.

What group is iodine in on the periodic table?

• Group 7

• Group 6

• Group 5

• Group 8

How many total valence electrons are there in I3-?

• 23

• 20

• 21

• 22

How are the iodine atoms arranged in the I3- structure?

• In a square

• In a straight line

• In a circle

• In a triangle

How many valence electrons are used to form bonds between the iodine atoms?

• 8

• 6

• 4

• 2

What is the formal charge on each of the outer iodine atoms?

• -2

• -1

• 0

• +1

How many non-bonding electrons are present on each outer iodine atom?

• 7

• 6

• 5

• 4

What is the formal charge on the central iodine atom?

• -2

• -1

• 0

• +1

How many bonding electrons are associated with the central iodine atom?

• 2

• 4

• 8

• 6

How is the I3- ion represented to indicate it is an ion?

• With a negative sign

• With brackets and a positive sign

• With brackets and a negative sign

• With a positive sign