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