Across
- 1. building blocks which make up everything
- 2. made up of only one type of atom
- 6. bonds the bonds formed for compounds
- 8. isn't uniform
Down
- 1. mass the bottom number of an element
- 3. anything that takes up mass
- 4. is uniform
- 5. can only be physically separated
- 6. made up of two or more atoms chemically combined
- 7. number top number of the element