Documents Metals

Metals Metals By Jibrail Cheema Sodium (Na) Compounds of Sodium have been known since Ancient times. However it was first discovered/extracted from caustic soda in 1807 by…

Documents Metals

Metals Metals By Myre Adnan (View as Slideshow) Iron (Fe) It is unknown who discovered it, though its existence has been known since prehistoric times. Iron is extracted…