Across
- 4. lightweight metal used to make cans and foils
- 5. is commonly found in bananas
- 9. 1 is the mass number
- 10. named after the mineral beryl
- 15. has a distinct rotten egg smell
- 16. its nuclear notation is 11 and 5
- 17. chemical that is used to disinfect swimming pools
- 19. second element on the periodic table
- 20. the gas essential for human life
Down
- 1. mineral essential for strong bones and teeth
- 2. can be found in toothpaste
- 3. 7 is the number of protons and neutrons
- 6. its symbol is Na
- 7. its symbol is Mg
- 8. the element found in coal and diamond
- 11. its atomic number is 3
- 12. 22 is the number of neutrons
- 13. 14 is the number of neutrons
- 14. fifteenth element on the periodic table
- 18. a gas often used in colourful sign