1. Objectives I will know how ionic bonds form. I will be able to identify the number of valence electrons in an atom and how they allow an atom to bond.

2. T. Trimpe 2008 http://sciencespot.net/

3. Section A: Complete the chart using a periodic table to help you. Charge Cl7Gain 117 Complete the questions under section A on your worksheet.

4. Answer these questions: An atom that gains one or more electrons will have a ____________________ charge. An atom that loses one or more electrons will have a ____________________ charge. An atom that gains or loses one or more electrons is called an ____________. A positive ion is called a ______________ and a negative ion is called an _______________. POSITIVE NEGATIVE ION CATION ANION “An-Eye-On” “Cat-Eye-On”

5. What is an ionic bond? Atoms will transfer one or more ________________ to another to form the bond. Each atom is left with a ________________ outer shell. An ionic bond forms between a ___________ ion with a positive charge and a ________________ ion with a negative charge. Example B1: Sodium + Chlorine ELECTRONS COMPLETE METAL NONMETAL Sodium Chloride

6. Magnesium Iodide Potassium Iodide

7. Sodium Oxide Calcium Chloride

8. Aluminum Chloride

9. Bond with a Classmate Each student will receive an ion card. Wear your ion card and walk around the classroom to find another ion with the opposite charge. Complete the worksheet by writing the positive ion and negative ion. Give the formula of the compound by crossing over the charges and placing them as subscripts. For example, Ca +2 and Cl -1  CaCl 2 Name the compound, as shown in the example. After you have made three bonds using one ion, switch ions and form more bonds.

10. Exit Ticket Why do ions combine to form ionic compounds?

11. Objectives I will know how covalent bonds form. I will be able to model covalent bonds.

12. What is a covalent bond? Atoms ___________ one or more electrons with each other to form the bond. Each atom is left with a ________________ outer shell. A covalent bond forms between two _________________. Example C1: Hydrogen + Hydrogen SHARE COMPLETE NONMETALS

16. Edible Bonding Instructions: Using the Color Key on the Edible Bonding worksheet, create models for the molecules listed. Use toothpicks to show each pair of shared electrons. Use the colored pencils to draw each model.

17. Wrap-Up Explain some differences and similarities among your drawings.