Across
- 3. used in fireworks
- 5. in banana
- 6. backbone of everything
- 8. lightest element
- 10. 5th most abundant e material
- 14. highly radioactive
- 15. second lightest element
Down
- 1. aerospace metal
- 2. 29th element cu
- 4. 24th most abundant material
- 7. used in telecommunications
- 9. lightest material can float on water
- 11. 8th most abundant material
- 12. heavy dense material
- 13. brittle number 30 in the table