Elements of the Periodic Table

123456789101112131415161718
Across
  1. 3. Valuable metal used in catalytic converters
  2. 4. Inert gas, used in light bulbs
  3. 6. Used to galvanize steel
  4. 9. Heavy metal with symbol Pb
  5. 12. Essential for respiration
  6. 13. Valuable metal often used in jewelry
  7. 14. Chemical element with atomic number 1
  8. 16. Key component of steel
  9. 17. Lightweight metal used in cans
  10. 18. Good conductor of electricity
Down
  1. 1. Gas that creates bright signs
  2. 2. Makes up majority of Earth's atmosphere
  3. 5. Liquid at room temperature
  4. 7. Basis of organic chemistry
  5. 8. Discovered by Henry Cavendish in 1766
  6. 10. Reactive gas, used in toothpaste
  7. 11. Noble gas used in balloons
  8. 13. Reactive metal in table salt
  9. 15. Precious metal with symbol Au
  10. 18. Used to purify drinking water