Across
- 3. the smallest particle that has the properties of an element.
- 5. the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance.
- 7. a substance that cannot be broken down into simpler substances.
- 9. substances are not uniformly mixed.
- 10. a combination of more than one pure substance.
Down
- 1. any matter that has a fixed composition and definite properties.
- 2. mixing occurs between individual units.
- 4. is anything that has mass and occupies space
- 6. a substance made of atoms of more than one element bound together.
- 8. the smallest unit of a substance that exhibits all of the properties characteristic of that substance.