1852
1852
photosensitive alloy containing silicon
Silver chloride, bromide or iodide (photosensitive compounds)
Russia.
Gutenburg first invented printing that used separate metal letters.
No one invented metal. Metals are naturally occurring elements in the earths crust (and core)
William Jenney
It was first invented in 13th century CE when Iron and Charcoal were blended correctly.
It is so small that when sodium is exposed to the sun light, the energy of sun light is enough to cause the ionization of sodium metal. Hence it is called a photo-sensitive metal.
Pretty much Black Sabbath invented Metal. Which first song, I don't exactly know.
Reaper Maybe the metal plow
duby the 3rd