Across
- 2. have a shiny appearance
- 3. substances containing one kind of atom
- 4. two or more different atoms chemically combined
- 6. dull not shiny
Down
- 1. change reversible-can be turned back
- 2. two or more atoms chemically combined
- 4. change not reversible- can't be turned back
- 5. two or more different substances that are not chemically combined