Across
- 1. (a substance made by mixing other substances together)
- 4. (a subatomic particle of about the same mass as a proton without and electrical charge)
- 6. (relating to atom or atoms )
- 7. (a stable subatomic particle occuring in all atomic nuclei)
- 8. (an amount of matter in a certain space)
Down
- 1. (a large amount of matter in a particle or object)
- 2. (a basic part of a whole
- 3. (an ability to transfer energy)
- 5. (a thing that is composed of two or more separate elements; a mixture)
- 6. (a basic unit of a chemical element )