Across
- 3. A materical that increases the rate of a reaction by lower the activation energy.
- 4. When two or more elements or compounds combine to make a more complex substance.
- 5. The study of matter and how matter changes.
- 7. A reaction in which energy is absorbed.
- 13. Anything that has mass and takes up space.
- 15. A neutral group of atoms joined by covalent bonds.
- 16. The substance you have at the beginning.
- 17. A covalent bond in which electrons are shared unequally.
Down
- 1. A mixture made of two or more elements.
- 2. An atom or group of atoms that has an electric charge.
- 3. A change in matter that produces one or more new substances.
- 5. Is a characteristic of a substance that describes its ability to change into other substances.
- 6. Any change that alters the form or apperance of a substance but dosen't make the substance into another substance.
- 7. A reaction that releases energy in the form of heat.
- 8. Breaks down compounds into simpler products.
- 9. A combination of symbols that shows the ratio of elements in a compound.
- 10. The attraction between two postivly charged ions.
- 11. A covalent bond in which elements are shared eqaully.
- 12. The cells in your body contain biological catalyst.
- 14. When ions form an orderly three dimensional arrangement.