Across
- 3. another general part of an atom
- 5. particles/subatomic particles found in nucleus
- 9. also known as nucleon number
- 10. contains protons and neutrons
- 11. atoms of the same element with different mass numbers
Down
- 1. a 3D structure
- 2. identity of element and number of protons
- 4. the lightest subatomic particle
- 6. one of the general parts of an atom
- 7. positive ion
- 8. negative ion