1. Reactions Quiz 1
REVIEW

2. Notebook p.56
MgNO3 In this compound, how are the atoms sticking together? Why are elements from group 18 never in a compound?

3. Chemical Bonds
Atoms are connected by their valence electrons creating chemical bonds.

4. They each have ____ valence electrons

6. There are __chemical bonds6

7. Anything that has mass and volume is Matter
Question 1

8. In a chemical reaction the ______ between atoms change. BONDS
Question 2

9. Chemical bonds are connections atoms make using their VALENCE ELECTRONS
Question 3

10. The group that has the maximum valence electrons and doesn’t need to make any bonds is the INERT GASES
Question 4

11. This atoms has ____ valence electrons.5
Question 5

12. Notebook p.58
What is the difference between a chemical and physical change?

13. Chemical Changes
Chemical changes change the bonds between atoms and create new substances.

14. In a chemical change when the new substance forming you might see:
Gas Forming
Color change
Temperature
change

15. Physical Changes
Melting, Freezing, Dissolving, Ripping, Squeezing are all physical changes. Why? There are NO bonds broken and NO new substances made.

16. Chemical reactions are important because they make NEW SUBSTANCES
Question 6

17. Besides burning, what is an example of a chemical change?
Question 7

18. Besides ripping paper, what is an example of a physical change?
Question 8

19. What are 3 things you need to know to pass this quiz? Be specific.