Module 1 Intro

Module 1—Chemical Foundations

Explore

 

Watch and Listen

 

This video will introduce you to an ionic compound called sodium chloride—the chemical name for table salt—and introduce the chemical components of sodium and chlorine. Use this video to review the general properties of ionic compounds.

Ionic compounds are formed when a metallic element combines with a non-metallic element (e.g., NaCl).

 

View this video about the formation of NaCl. You may wish to “pause” the video and draw the representations of the sodium and chlorine atoms before they react and after they react. What happens, with respect to the arrangement of electrons around these two atoms, when the compound sodium chloride is made? Is this change consistent with what you learned in the previous lesson? Post a copy of your diagram and your answers to your class discussion area. Have a classmate review your answers. If you wish, revise your answer by including classmate comments. Place a copy of your revised work in your course folder.

Read

 

Ionic compounds are formed when electrons are transferred from a metal to a non-metal. As you saw in the most recent video, an ionic compound forms when the metal will lose electrons to have filled energy levels. Also, the non-metal will gain electrons to have filled energy levels. The transfer of electrons between metals and non-metals produces positively and negatively charged particles (ions) that attract each other to form an ionic bond.

 

An ionic bond is the result of an intramolecular force caused by the attraction of oppositely charged particles. You will examine four different types of ionic compounds:

• binary ionic compounds

• multi-valent metals

• polyatomic ions

• ionic hydrates

 

Binary Ionic Compounds

 

Read “Binary Compounds” on page 29 of the textbook. If you want more of a review on this type of ionic compound, follow this link.

 

Self-Check

 

SC 1. Complete each statement by providing the correct chemical name or chemical formula.

1. MgBr2 is ____________________.

2. Al2S3 is ____________________.

3. The formula for beryllium nitride is ____________________.

4. The formula for potassium phosphide is ____________________.

5. CaO is the formula for ____________________.