Elements - Oskar, Ruby, Olivia, Caleb, Zane

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Across
  1. 7. The lightest gas
  2. 8. Does not form oxides until very high temperatures
  3. 9. Commonly used in currency
  4. 10. Soft grey transition metal found in pyrochlore
  5. 11. Can form different isotopes, depending on the rate of temperature change
  6. 12. Rare transitional metal belonging to the platinum group of the periodic table
  7. 14. The third lightest halogen that forms a red/brown liquid.
  8. 16. discovered in Cornwall, Great Britain, in 1791
  9. 18. Needed in your muscles, it is often added to table salt as an additional dietary source
Down
  1. 1. An element used to make magnets
  2. 2. Name derived from the place it was found; Magnesia, Greece
  3. 3. Used to make bright red fireworks
  4. 4. Makes up 8% of the Earth's crust
  5. 5. Not found naturally but easily obtained by smelting
  6. 6. First isolated from potash
  7. 13. Found in ammonia
  8. 15. Called "Brimstone" in the Bible
  9. 16. extraction of this element can be dated back to around 300 BC
  10. 17. Gives a reddish/orange glow in low voltage conditions