Across
- 2. Firm and hard object
- 5. A substance made by mixing other substances together.
- 8. The basic unit of a chemical element.
- 9. A substance produced by a living organism
- 11. A substance that changes during a reaction.
- 12. A substance produced during a natural, chemical,
- 13. A solid that is hard andshiny
Down
- 1. Airlike substance
- 3. Consistency like that of water
- 4. table A table of the chemical elements arranged in order of atomic number
- 6. A part or aspect of something
- 7. A thing that represents or stands for something else
- 10. A set of chemical symbols