Understanding the Lewis Structure of the Triiodide Ion

This video tutorial explains how to draw the Lewis structure of the triiodide ion (I3-). It begins by calculating the total number of valence electrons, considering iodine's position in the periodic table and the ion's negative charge. The tutorial then guides viewers through drawing the Lewis structure, including determining lone pairs and bonds. It also covers calculating formal charges for each iodine atom and discusses the molecular geometry and hybridization of the ion, concluding with the linear shape and bond angles.

How many valence electrons does each iodine atom contribute in the triiodide ion?

• 5

• 6

• 7

• 8

What is the total number of valence electrons in the triiodide ion?

• 22

• 21

• 20

• 23

How many lone pairs are present on the central iodine atom in the triiodide ion?

• 3

• 2

• 4

• 1

What is the typical number of bonds formed by iodine when it is not the central atom?

• 1

• 2

• 4

• 3

How many electrons are accounted for in the Lewis structure of the triiodide ion?

• 23

• 21

• 20

• 22

What is the formal charge on the central iodine atom in the triiodide ion?

• +2

• -1

• 0

• +1

What is the formal charge on the terminal iodine atoms in the triiodide ion?

• +1

• +2

• 0

• -1

What is the molecular geometry of the triiodide ion?

• Bent

• Linear

• Trigonal Planar

• Tetrahedral

What is the bond angle in the triiodide ion?

• 90 degrees

• 120 degrees

• 180 degrees

• 360 degrees

What is the hybridization of the central iodine atom in the triiodide ion?

• sp3

• sp2

• dsp3

• sp