Calcium Sulfide and Ionic Compounds

The video tutorial explains how to name the compound CAS, which is an ionic compound consisting of calcium and sulfur. It details the process of identifying the elements involved, applying naming rules to form the name 'calcium sulfide', and writing the chemical formula by considering the ionic charges of calcium and sulfur. The tutorial emphasizes the importance of recognizing the type of compound and using the periodic table for accurate naming and formula writing.

What type of compound is formed when a metal and a nonmetal combine?

• Metallic compound

• Ionic compound

• Organic compound

• Covalent compound

What is the first step in naming a binary ionic compound?

• Write the name of the nonmetal first

• Write the name of the metal first

• Determine the molecular geometry

• Calculate the molar mass

How is the name of the nonmetal modified in a binary ionic compound?

• Keep the name unchanged

• Replace the ending with 'ide'

• Add 'ite' to the end

• Add 'ate' to the end

What is the ionic charge of calcium when it forms a bond?

• 1-

• 2-

• 2+

• 1+

What is the ionic charge of sulfide in the compound CaS?

• 1-

• 2-

• 1+

• 2+

What is the correct formula for calcium sulfide?

• CaS

• Ca2S

• CaS2

• Ca2S2

Who is the presenter of the video tutorial on calcium sulfide?

• Dr. A

• Dr. D

• Dr. B

• Dr. C