Across
- 2. a substance made up of two or more elements that are chemically combined
- 5. NaCl is the chemical ............... for sodium chloride
- 6. every element has its own chemical ................
- 7. a substance made up of only one type of atom that cannot be broken down into other substances
Down
- 1. the smallest part of an element that can exist
- 3. a group of two or more atoms strongly joined together
- 4. the properties of a compound are ............... to those of its elements