1. Observe the pictures below.
Bell Work:
Observe the pictures below. A B C

2. Preparing for TCAP… electrons 4 Noble Gases SPI 0807.9.1
The negatively charged particles in an atom are called the __________.
electrons
SPI
How many compounds are shown below?
CO H2O OH He
Co Cl Be CO2 4
SPI
What family on the periodic table are stable and do not form bonds?
Noble Gases

3. Law of Conservation of Mass
Reactants
Products
Subscript
Coefficient
Yield Sign

4. Law of Conservation of Mass

5. Law of Conservation of Mass

6. Law of Conservation of Mass Group Tasks
Today’s Expectations:
Every member of your group will record their own answers.
Every group needs the following…
Reader—One person to read the tasks or questions
Communicator—One person to ask for help
Researcher—At least one person with an organized composition notebook
Thinker—All members will participate

7. Law of Conservation of Mass Group Tasks
Directions:
As a group, go through each of the questions over the law of conservation of mass and counting atoms then complete the question or task for each one on your response sheet.

8. Law of Conservation of Mass Atomic Model Kits
For every chemical equation shown, create an atomic model for each of the compounds. Use an Expo marker to draw the yield sign on your desk. Check to see if the Law of Conservation of Mass is accurately represented.

9. Law of Conservation of Mass Atomic Model Kits
2 H2 + O2 → 2H2O

10. Law of Conservation of Mass Atomic Model Kits
CH4 + O2 → CO H2O

11. Law of Conservation of Mass Atomic Model Kits
2 SO2 + O2 → 2 SO3