Ionic Compounds and Calcium Chemistry

The video tutorial explains how to write the formula for calcium fluoride, an ionic compound. It begins by identifying calcium as a metal and fluoride as a non-metal, indicating the formation of an ionic compound. The tutorial then discusses the element symbols for calcium (Ca) and fluoride (F) and their respective ionic charges, with calcium having a 2+ charge and fluoride a 1- charge. To achieve a neutral compound, the charges must balance, resulting in the formula CaF2. The video concludes with a summary of the process and the final formula.

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

• Covalent compound

• Ionic compound

• Molecular compound

• Metallic compound

What is the element symbol for calcium?

• Cl

• Cf

• Ca

• C

In which group of the periodic table is calcium found?

• Group 18

• Group 17

• Group 1

• Group 2

What is the ionic charge of fluoride?

• 2+

• 1+

• 1-

• 2-

Why must the charges in an ionic compound add up to zero?

• To make the compound stable

• To ensure the compound is neutral

• To balance the electrons

• To match the periodic table

How many fluoride ions are needed to balance the charge of one calcium ion?

• Two

• One

• Four

• Three

What is the chemical formula for calcium fluoride?

• Ca2F

• CaF

• Ca2F2

• CaF2