Across
- 3. the mass of an atom
- 10. energy carried by charged particles
Down
- 1. a microscopic thing that makes up all objects
- 2. energy carried by light waves
- 4. energy that has too with motion
- 5. energy carried by sound waves
- 6. the number of protons found in an element
- 7. the center region of an atom
- 8. found in the nucleus neutral
- 9. found in the nucleus positive