Across
- 2. a naturally occurring substance that is solid and stable at room temperature
- 4. element that has the chemical symbol 'Fe'
- 8. method of extraction using an electrical current
- 9. furnace a type of metallurgical furnace used for smelting to produce industrial metals
- 10. gold, silver and ______ are very unreactive
- 13. the loss of oxygen
- 14. rocks containing compunds
Down
- 1. gold silver and platinum all have low _______ levels
- 3. combination of two or more elements
- 5. fourth most abundant element in the universe
- 6. the gain of oxygen
- 7. used in the making of planes to make them light
- 10. elemnt with the chemical symbol 'K'
- 11. chemical that is made up of one type of atom
- 12. used in most wedding rings