Understanding Aluminum Sulfide Compounds

The video tutorial explains how to name and write the formula for the ionic compound Al2S3, known as aluminum sulfide. It begins by identifying the compound as a binary ionic compound, consisting of a metal (aluminum) and a nonmetal (sulfur). The naming process involves writing the metal's name as it appears on the periodic table and modifying the nonmetal's name by replacing its ending with 'ide'. The tutorial also covers the charge balancing process, explaining that aluminum forms 3+ ions and sulfur forms 2- ions, resulting in a balanced formula of Al2S3.

What type of compound is Al2S3?

• Molecular compound

• Ternary compound

• Binary ionic compound

• Covalent compound

Which elements make up the compound Al2S3?

• Aluminum and sulfur

• Sulfur and oxygen

• Aluminum and nitrogen

• Aluminum and oxygen

How do you write the name of the metal in an ionic compound?

• In lowercase letters

• As it appears on the periodic table

• With a prefix indicating quantity

• With a suffix '-ide'

What suffix is used for the nonmetal in a binary ionic compound?

• -ite

• -ide

• -ous

• -ate

What is the charge of aluminum ions in Al2S3?

• 3+

• 2+

• 4+

• 1+

What is the charge of sulfur ions in Al2S3?

• 2-

• 4-

• 3-

• 1-

How do the charges of aluminum and sulfur ions balance in Al2S3?

• 3 aluminum ions balance 2 sulfur ions

• 4 aluminum ions balance 3 sulfur ions

• 2 aluminum ions balance 3 sulfur ions

• 1 aluminum ion balances 1 sulfur ion

What is the chemical formula for aluminum sulfide?

• Al3S2

• Al2S3

• AlS

• AlS2