1. Do Now Please update your table of contents. Please take the sheet from the front cart and place it on pg. 97 Divide pg. 96 horizontally about ¾ down the page. Page #Title 96-97Ionic Bonding

2. Ions on page What happens when an atom loses an electron? What is its new charge? What happens when an atom gains an electron? What is its new charge? What happens once these ions have formed? What holds an ionic bond together?

4. Ionic Bonds Ionic bonds form as a result of the attraction between positive and negative ions!

5. Ionic Bonds Let’s check out two videos on ionic bonding… NOVA: How Elements Form Compounds What are ionic bonds? How do you know the formula for an ionic compound?

6. Drop and Swap 1. Find the charge of the ions and remove the + and – signs. 2. If the numbers are the same, they cancel each other out. 3. If the numbers are different, “drop” them and “swap” them. 4. If a number is dropped to a polyatomic ion, then brackets need to be inserted.

7. Drop and Swap Mg +2 + O -2 Mg +2 + Cl -1 Mg 2 + O 2 Mg 2 + Cl 1

8. Drop and Swap Mg +2 + OH -1 (NH 4 ) +1 + S +2 Mg 2 + OH 1 Mg(OH) 2 Magnesium hydroxide Milk of magnesia (NH 4 ) 1 + S 2 (NH 4 ) 2 S Ammonium sulfide Main ingredient of stink bombs

9. Bond With A Classmate Find a classmate who is representing an ion with the opposite charge as your ion. Work together to follow the steps of the drop and swap, and write the formula for the compound on your worksheet. Once you have bonded with as many classmates as you are able, start on the Ionic Bonding Worksheet.