Across
- 4. the basic unit of chemical element
- 5. substance that undergoes reactions
- 7. is when something changes but not on the chemical level
- 8. physical substance it occupies space
- 9. the compactness of a substance
Down
- 1. something that can be shaped but not broken
- 2. atoms in a group and are the smallest form of chemical compound that can chemically react
- 3. matter usually large with no specific shape
- 5. how reactive something is
- 6. the rearrangement of atoms in usually one or more substances