Aluminum Iodide Compounds and Ions

The video tutorial explains how to write the formula for aluminum iodide. It begins by identifying the element symbols for aluminum and iodide. The tutorial then discusses the importance of balancing charges to achieve a neutral compound, using the periodic table to determine the charges of aluminum and iodide ions. Finally, it demonstrates the crisscross method to derive the formula AlI3, ensuring the charges balance to zero.

What are the element symbols for aluminum and iodide?

• Alm and I

• Al and Id

• A and I

• Al and I

Why is it important to consider charges when writing the formula for aluminum iodide?

• To make the compound more reactive

• Because iodide is a metal

• To ensure the compound is neutral

• Because aluminum is a gas

What is the charge of an aluminum ion?

• 1+

• 4+

• 2+

• 3+

What is the charge of an iodide ion?

• 1-

• 4-

• 2-

• 3-

How many iodide ions are needed to balance one aluminum ion?

• One

• Two

• Three

• Four

What is the final formula for aluminum iodide?

• AlI3

• Al3I

• AlI2

• AlI

What method can be used to determine the formula of aluminum iodide?

• Addition method

• Crisscross method

• Balancing method

• Substitution method