Across
- 3. a change of matter from one form to another without a change in chemical properties
- 10. two or more different types of atoms joined together
- 11. one or two letters that represent an element
- 13. Basic unit of matter
- 14. A group of atoms joined together
Down
- 1. A change in matter that produces one or more new substances
- 2. a number placed in front of an element symbol
- 4. combination of chemical symbols and numbers to represent a substance
- 5. a substance that forms in a chemical reaction
- 6. mass/volume
- 7. A chemical change in which a substance combines with oxygen
- 8. A chemical substance that is present at the start of a chemical reaction
- 9. A number written slightly below
- 12. anything that has mass and takes up space