Chemisty Crossword

2. Change of state from a liquid to a solid
4. description of how a substance interacts with other substances, such as acids;chemical properties are observable only when a chemical change occurs
8. A compound that dissolves in water to form a solution with a pH higher than 7
9. pure substance that cannot be broken down into other substances; substance made up of only one type of atom
12. odorless gas;produced by incomplete combustion of chemicals containing carbon
13. a substance that helps a chemical reaction to proceed more quickly
14. amount of mass in a given volume of a substance
17. a reaction that takes place when two or more substances react to form new substances
19. mixing of a substance with air or water;this reduces the substance’s concentration
21. process in which molecules move from an area of higher concentration to one of lower concentration
22. cloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated out from the other substance
23. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
24. chemical combination of two or more elements in a specific ratio
25. Group 1 elements on the periodic table. the most reactive elements. Does not include hydrogen.

1. change of state from a liquid to a gas
3. chemical reaction that absorbs energy
5. principle that matter is not created or destroyed in a chemical reaction; the mass of the products always equals the mass of the reactants
6. Group 2 elements on the periodic table. Not as reactive as group 1 but more reactive than all other groups.
7. change of state from a gas to a solid
10. an experiment in which all reactants and all products of a chemical reaction are accounted for
11. The tiniest part of an element that represents said element. Contains a nucleus, and a balanced amount of protons and neutrons.
12. chemical reaction that takes place in cells; food (sugar) reacts with oxygen to produce energy, water, and carbon dioxide
15. The unit used in measuring an atom's mass.
16. change that results when two or more substances react to create a different substance or substances; the new substances have completely different properties from the original ones
18. change of state from a gas to a liquid
20. A compound that dissolves in water to form a solution with a pH lower than 7.