We do not know. Copper was discovered before we had writing to keep records. People have used copper for about 6,000 years.
who discoverd copper
Chinese
Jesus
alfred wegner.
John newton browne
it wasn't, it is Spanish.
Petra was discoverded by Johann Ludwig Burckhardt.
Sir Humphrey Davey and Gay-Lussac
the cridit goes to Galileo who discoverded it with his won telescope which he invented.
I think when the telescope was invented, I think people use it to look at other planets. Even moons.
Because a telescope is not needed to see Jupiter from Earth, ancient astronomers were aware of its existence.
Cesium was discovered by Bunsen and Kirchhoff.
No one "discovered" it, just like no-one "discovered" the sky. Anyone who has the faintest idea where "Giza" is already knows about the pyramids.