Across
- 3. numbers going down the left side of the periodic table, and tells you how many shells there are
- 4. atomic number 97
- 6. has 81 electrons
- 8. atomic number 8
- 11. has a positive charge
- 13. atomic number 102
- 15. another word for shells
- 16. atomic number 80
- 17. has a neutral charge
- 19. where protons and neutrons are located
- 23. eight least reactive
- 24. atomic number 3
- 25. atomic number 30
Down
- 1. seven the most reactive group
- 2. groups numbers that go along the top of the periodic table, and tells you how reactive an element is
- 5. has a negative charge
- 7. has 18 protons
- 9. has 2 protons
- 10. atomic number 85
- 12. electrons electrons that are on the last outer shell, and tells us what element they can combine with
- 14. 83 electrons
- 18. atomic number 69
- 20. one of the least reactive elements
- 21. where electrons are located
- 22. one of the most reactive elements