BrI2- Lewis Structure and Geometry

This video tutorial explains how to write the Lewis structure for the BR I2- ion, including counting valence electrons and constructing the structure. It discusses the placement of bromine and iodine atoms, the concept of formal charges, and the stability of the structure. The video also covers the molecular geometry, which is linear, and the electron geometry, which is trigonal bipyramidal, providing a comprehensive understanding of the BR I2- ion's structure and properties.

What is the main objective of the video tutorial?

• To understand chemical reactions

• To write the Lewis structure for BrI2- and explore its geometry

• To learn about the periodic table

• To study the properties of metals

How many valence electrons does the BrI2- ion have?

• 20

• 21

• 22

• 23

Which element is placed at the center of the BrI2- Lewis structure?

• Bromine

• Iodine

• Fluorine

• Chlorine

What is the total number of valence electrons used to form bonds in the BrI2- Lewis structure?

• 10

• 8

• 6

• 4

Why can bromine have more than eight valence electrons in the BrI2- structure?

• Because it is in Period 2

• Because it is in Period 3 or below

• Because it is a metal

• Because it is highly electronegative

What is the formal charge on the central bromine atom in the BrI2- ion?

• +1

• 0

• -1

• -2

Why is the formal charge on bromine in the BrI2- structure considered favorable?

• Because it is on the least electronegative element

• Because it matches the ionic charge

• Because it is positive

• Because it is zero

What is the molecular geometry of the BrI2- ion?

• Tetrahedral

• Trigonal planar

• Linear

• Bent

What is the bond angle in the linear molecular geometry of BrI2-?

• 120 degrees

• 90 degrees

• 109.5 degrees

• 180 degrees

What is the electron geometry of the BrI2- ion?

• Trigonal planar

• Octahedral

• Tetrahedral

• Trigonal bipyramidal