CHEMISTRY CROSSWORD

1. a substance with a pH greater than 7
6. the relationship between products and reactants in a chemical reaction to find quantitative data
9. chemical reactions or physical change of state involving heat
12. a unit of measure of large quantities of small atoms and molecules etc.
14. substituting one element with another element
17. when two parts of an ionic compound are exchanged to make two more new ones
19. chemical compounds changing and breaking down
20. a substance with a pH less than 7

2. expressing the required degree of accuracy with each digit of a number, starting with the first non-zero number
3. describing properties of gases, like Charles' and Boyles'
4. absorbtion of heat
5. two or more substances in a homogeneous mixture
7. release of heat
8. relationship between heat and other forms of energy
10. rearranging ionic or molecular structures of a substance
11. when functional groups or atoms attract electrons to themselves
13. a chemical reaction that uses heat, accompanied by oxygen
15. non-chemically linked compounds of two or more chemical compontents
16. chemical compounds producing simpler materials
18. system of numbers, amounts, or elements in mathematics