Across
- 5. element with the smallest atomic radius
- 7. negatively charged particle
- 10. the state of matter that we breathe
- 11. element 23
- 13. positively charged particle
- 15. soft metal we blew up in class
- 17. has no charge
- 18. the state of matter water is in
- 19. family with traits of both metals and nonmetals
- 21. tells how many energy levels there are
Down
- 1. model with rings
- 2. the family with 7 valence electrons
- 3. element at period 5 column 7A
- 4. metal that is liquid at room temperature
- 6. element with the largest atomic radius
- 8. state of matter that means dissolved in water
- 9. outermost shell
- 12. an atom with more neutrons than usual
- 14. the state of matter that ice is in
- 16. non-metal that is liquid at room temperature
- 20. model with valence electrons only