chemistry crossword

3. symbolic representations that specify the elements present in a compound
6. often defined as anything that occupies space and has mass
7. a periodic back and forth motion that transmits energy
9. occurs in only one direction
10. chemical changes caused by collisions between atoms or molecules
11. extracting metals from their naturally occurring materials and preparing them for use
14. the simplest element

1. the law that dobereiner created
2. an attractive force between atoms that is strong enough to enable the group to act as a unit
4. a homogeneous mixture of two or more substances
5. the branch of science that deals with the study of the composition
8. the ability to do work
12. known to have a sour taste when dissolved in water
13. describes a change in some quantity over time
15. greatly affected by both pressure and temperature change