Across
- 3. letters and numbers showing the types and number of atoms that make up a substance
- 6. something that can be observed about a substance, such as color, smell, or boiling point
- 7. the tiny pieces that all matter is made of
- 8. a substance that lowers the activation energy of a chemical reaction
- 10. an ending substance that is made during a chemical reaction
- 11. a process in which atoms rearrange to form new substances
Down
- 1. the amount of energy required to create a chemical reaction
- 2. something that is made of all the same atoms or groups of atoms
- 4. a strong force of attraction holding two or more atoms together
- 5. a starting substance that is part of a chemical reaction
- 9. a group of atoms joined together in a particular way