Great bell ringer/ warm-up activity or homework assignment.
The first two sheets give a brief explanation on how to count the number of atoms in compounds. There are then 15 practice problems. Answer key included.
Also, included - two exit tickets - with answer keys.
Great graphics from whimsyclips.com
How to get TPT credit to use on future purchases:
* Please go to your My Purchases page (you may need to login). Beside each purchase you'll see a Provide Feedback button. Simply click it and you will be taken to a page where you can give a quick rating and leave a short comment for the product. EACH TIME you give feedback, TPT gives you feedback credits that you use to lower the cost of your future purchases. YOUR FEEDBACK IS VERY IMPORTANT as it helps me determine which products are most valuable for your classroom so I can create more for you. ☺