Across
- 4. substance has constant composition and has not been changed
- 7. Any change that occurs without altering the chemical composition
- 8. the basic unit of a chemical element and extremely small
- 9. states that mass is neither created or distroyed
- 10. substances present in a chemical reaction that are consumed during the reaction to make
Down
- 1. substance that is formed when two or more chemicals react
- 2. a change that cannot be reversed
- 3. a column of elements
- 5. horizontal row of the periodic table, there are seven
- 6. the process of changing from a liquid to vapor