OK Johann. So I got it then.
Let us ponder a little more on alchemy, the precursor to my current profession
These are the chemical elements known to the Ancients:
Carbon as charcoal came with the discovery of fire.
Sulfur was to be found near volcanoes.
Copper was the first metal to be worked (~5000 BC).
Gold and
Silver objects were first produced ~3000 BC.
Iron smelting led to Iron Age.
Tin was used earlier to forge bronze, an alloy of copper that was much stronger, but the element itself was not smelted as such until ~2100 BC.
Mercury was reported ~1500 BC. This forms when the ore cinnabar (HgS) is heated, and it also occurs naturally in cinnabar deposits.
Lead appeared ~1000 BC and was extensively mined. It became the most important metal in the Roman Empire.
Antimony objects date from ~1600 BC although this metal was not much used.
Then there were no discoveries until the Middle Ages and alchemy.
The discovery of one of the elements is seen as a turning point between alchemy and chemistry.
With no further ado:
I want you to name two elements disvovered by alchemists, appr. year of discovery, the names of the alchemists and which element was the turning point.