Chemical Properties and Changes

3. Chemicals can be represented using these groups of chemical symbols and subscripts.
4. The difference in the types of properties is whether or not this changed while being observed.
8. New substances have new ________ after a chemical change.
9. The only sure sign that a chemical change occurred is when new ________ form.
13. Rusting is an example.
15. Mass is __________ during a chemical reaction.
16. When fruit rots it emits an ________ which is a sign of a chemical change.
17. To decay due to the growth of bacteria or fungi.
18. Chemical equations must be __________ to show equal numbers and types of atoms on both sides.
19. A type of change in matter that results in a new substance with different properties.
20. The substance that form as a result of a chemical change.

1. Increasing this will cause substances to react more quickly.
2. Letters are to atoms as words are to _________.
5. Another name for a chemical change.
6. The reddish coating that results from a chemical reaction between iron, oxygen, and water.
7. The amount of a substance in a given volume.
10. What fuel does as it undergoes a chemical change.
11. When this changes in leaves, it is a sign that a chemical change has happened.
12. The substances that react together in a chemical reaction.
14. A chemical reaction involving a solid will occur more quickly if the surface area is ____________.