Across
- 3. element which makes diamond
- 5. most reactive metal in the periodic table
- 7. metal which forms the main part of steel
- 8. non-metal which is in liquid form
- 12. the most unreactive metal
- 14. metal used in making aircraft bodies
- 16. element which forms a main part of sand
- 17. element which is used for nuclear power generation
Down
- 1. element in the periodic table without neutrons
- 2. metal which is in liquid form
- 4. most reactive non-metal in the periodic table
- 6. noble gas sued in weather balloons
- 9. element needed for respiration by all organisms
- 10. metal used in electrical wiring
- 11. element needed for healthy bones
- 13. element needed for making chlorophyll
- 15. element which is an important part of proteins