Across
- 3. model first proposed by j.j. thomson
- 5. anything that has mass and occupies space
- 6. discovery made by becquerel
- 7. a part of an atom with a negative electrical charge
- 9. the foundation of matter
- 10. a part of an atom with no electrical charge
Down
- 1. the study of the chemistry of processes in living organisms
- 2. tells you the number of protons and neutrons in the nucleus
- 4. two or more elements
- 8. the science that describes matter