1746
There's no exact date of discovery but it's around 300 BC.
Johann Wolfgang Döbereiner discovered the concept of the law of triads in 1817.
Zinc is knowm from antiquity.
The discovery and date of aluminum
what is the Discovery Date for mercury? please someone tell me!!!!!!!!!!!
Zinc was discovered in ancient times, with evidence of zinc mining dating back to 1500-1000 BC in present-day India. The element was recognized as a distinct metal by Andreas Sigismund Marggraf in 1746.
He invented the x-ray in 1895. X-Rays were not "invented", they were discovered. The exact date of discovery was Nov 8, 1895.
The discovery of radioactivity
Carbon, Sulfur, Iron, Copper, and Zinc.
There is no exact date of discovery. Jupiter is visible to the naked eye and has been known since before the dawn of civilization.
Saturn has been visible as long as mankind can remember, so it does not have a discovery date.
Lincoln cents from 1982 to date are 99.2% Zinc & 0.8% copper.