Across
- 3. Is used to keep pools clean, it has the chemical symbol Cl
- 5. Mirror one of the most toxic elements on the periodic table
- 8. Something that is inhaled every day. It is number 8
- 10. Number 14, can be used to seal holes
- 14. makes up about 40% of salt, it’s a metal
- 15. Naturally present in many foods, its shells have 2, 8, 5
- 16. Most commonly obtained from coal deposits, it is used in metal smelting
- 17. Lighter than air, makes your voice sound weird.
- 18. A metal, foil is made from it
- 19. Pale yellow in colour, used in fireworks
Down
- 1. Has the symbol N, used to make fertilisers
- 2. Found in milk, make bone strong
- 4. Nutrient needed for healthy muscles and bones, has the symbol Mg
- 6. Has the atomic number 1, used in fuel cells to create power and heat
- 7. Atomic number of 18, used by welder to protect the welding area
- 9. The gas is used in advertising signs, its shells have 2, 8
- 11. Used in flat-panel display production, has the symbol F
- 12. Found in weed killers, Symbol is B
- 13. Rechargeable batteries in phones, it is the least dense metal.
- 15. Number 19, found in banana