Across
- 1. all metals except for boron
- 3. very reactive but not as much
- 6. 7 valence electrons
- 7. has 5 valence electrons
- 9. unreactive
Down
- 2. has 6 valence electrons
- 4. reactivity increases as you go down
- 5. the moderate reactivity
- 8. has 4 valence electrons