- Copper was probably the first metal mined and crafted by man. It was discovered in the Middle east.
- Phosphorus was the first element to be discovered chemically and it was prepared from urine.
- Pottasium (discovered by H. Davy) was discovered by using electrolysis on potash.
- Calcium was discovered by electrolysis on quick lime and sodium by the electrolysis on sodium hydroxide
- Caesium was discovered by its blue emission lines in a sample of mineral water.
source : https://en.wikipedia.org/wiki/Discoveries_of_the_chemical_elements
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