Across
- 2. Short for compound that speeds up reactions
- 3. The process of combining atoms to form new substances
- 6. When substances combine and create something new
- 9. The ability to do work or cause change
- 10. Anything that has mass and takes up space
- 11. The temperature at which a substance changes from a solid to a liquid
Down
- 1. Substance made when two or more elements are chemically combined
- 2. A reaction that absorbs energy
- 4. The center of an atom
- 5. A substance made of only one kind of atom
- 7. Negatively charged particle found in an atom
- 8. The smallest unit of matter
- 11. The amount of matter in an object