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