Across
- 7. The reaction where heat is absorbed. (10)
- 9. A substance made of two or more chemically bonded elements. (8)
- 12. A compound that fizzes upon contact with blood. (16)
- 14. The type of reaction that releases energy, often as heat. (12)
- 15. When a liquid turns into gas, like water drying. (10)
- 16. The change when ice turns into water. (9)
- 17. The process of iron reacting with oxygen to form rust. (8)
- 22. The loss of electrons in a reaction. (9)
- 23. The basic unit of matter. (5)
- 24. Tiny bubbles formed in reactions like hydrogen peroxide with blood. (4)
- 27. The states of matter: solid, liquid, or gas. (5)
- 28. The term for a solid forming from a solution. (9)
Down
- 1. The process of absorbing water in a reaction. (9)
- 2. A metal that oxidizes to form rust. (4)
- 3. table A chart that organizes elements by properties. (13)
- 4. A change that alters the molecular structure of a substance. (14)
- 5. form when this reacts with blood. (7)
- 6. A change that does not alter chemical composition. (14)
- 8. The process of metal breaking down due to oxidation. (9)
- 10. The gas essential for oxidation and combustion. (6)
- 11. phase change where a solid turns into a liquid. (7)
- 13. The smallest unit of chemical compounds. (9)
- 18. A reaction where one substance breaks into two or more. (12)
- 19. The layer of gases surrounding Earth. (3)
- 20. A force that holds atoms together in molecules. (4)
- 21. A form of energy that can start chemical changes. (4)
- 24. A substance that undergoes a chemical change when burned. (5)
- 25. A substance used to neutralize stomach acid. (7)
- 26. The energy required to break chemical bonds. (6)
- 29. The process where metals lose their luster due to oxidation. (10)