Chemical Reactions

2. the temperature at which a substance changes from the solid phase to the liquid phase
5. a group of atoms joined together in a particular way
6. something that is made of all the same atoms or groups of atoms
7. to change the order or position of something
8. an ending substance that is made during a chemical reaction
11. a process in which atoms rearrange to form new substances
12. the temperature at which a substance changes from the liquid phase to the gas phase

1. letters and numbers showing the types and number of atoms that repeat to make up a substance
3. the tiny pieces that all matter—all the stuff in the world—is made of
4. a starting substance that is part of a chemical reaction
8. something that can be observed about a substance, such as color, smell, or boiling point
9. able to cause damage
10. the relative size of things