Review electronegativity definition. Use a compound known to exhibit ionic characteristics, and a compound known to exhibit covalent characteristics. From these two compounds, determine the difference in the electronegativity numbers of each element in each compound. Elicit that the ionic compound shows a high difference compared to the covalent compound. Determine a general rule which covers how to determine the type of bond. For the second class, perform a lab demonstration which will indicate that a chemical reaction has occured.

Discuss the forces of attraction and repulsion between atoms when they come together to form a molecule. Define and explain the attraction of an element for a second element. Electrons is termed the electronegativity. Explain how the numbers increase as the attractive force increases. Show why an atom of fluorine has a greater electronegativity number than an atom of lithium.

Using the textbook, and following the step by step procedure for correctly naming listed covalent compounds, name the molecules as shown in the text. Discuss some of the practical uses of the listed compounds, like the use in matches, as laughing gas and as a source of phosphorous to synthesie nuclaic acid.

Steps to follow when naming a binary covalent compound. Use an example of dinitrogen oxide and work through each step to arrive at the correct scientific name. From a preprinted activity, work 3-4 examples. Indicate the prefixes needed to be used.

Using preprinted diagrams depicting Lewis dot formulas for group 17 atoms, group 16 atoms and group 15 atoms, describe and demonstrate how these atoms can achieve a stable octet of electrons in their valence energy levels. Compare the results to a preprinted diagram showing the sharing of electrons and the formation of a single covalent bond. Repeat the process using double bonded binary atoms and triple bonded binary atoms. Once complete and discussed, use molecular models and have Ben construct the single, double, and triple bonded molecules and compare their bond lengths.

Diagram how covalent bonds form by using a series of examples. Define covalent bonding using the diagrams to help explain. Discuss rhe formation of diatomic molecules such as hydrogen gas, and why the molecule is stable.

Review nomenclature of binary compounds. Discuss Discoveries and uses of chemical compounds over the last 75 years. Introduce aspirin from the Willow tree bark and penicillin discovered growing in Petri dishes of bacteria contaminated by specific fungi.

Have Ben answer verbally the analysis and thought questions at the end of the lab exercise. The formulas for the products formed between the magnesium and oxygen in the air, and the magnesium and the nitrogen in the air are calculated and written.
The nomenclature of the binary ionic compounds is outlined on the board, and a series of examples for naming ionic compounds completed.

Synthesis lab: ionic compounds formed between magnesium and oxygen, and nitrogen.Both are found present in air. After synthesis, the compound is tested for acidity or alkalinity and also for conductivity. Analysis and questions to be answered in class on Fri

Continue with the formation of and the correct formula writing for ionic compounds. An activity sheet for this purpose is completed in class, with the writing of about 30 ionic formulas