periodic table
Across
- 2. a halogen
- 3. a transition metal
- 6. shiny metal
- 7. reacts with water
- 8. highest electronegativity
- 11. the first element
- 12. foundation of organic chemistry
- 14. first in the d block
Down
- 1. found in bombs
- 4. foil
- 5. symbol B
- 9. vital for life
- 10. a metal
- 13. a noble gas