Across
- 1. the thing at the center of an atom
- 5. table the has all the elements on it
- 8. the number of protons in an element
- 9. vertical columns on the periodic table
- 10. smaller particles that make up protons and neutrons
- 12. negatively charged particles
- 13. same element different neutrons
- 14. the smallest piece of matter, makes up everything
- 15. the sum of the protons and neutrons
Down
- 2. area around the nucleus where electrons are
- 3. positively charged particles
- 4. neutrally charged particles
- 6. diagram that uses dots and the element
- 7. the weight average of mix isotopes
- 11. horizontal columns on the periodic table