Partial-thickness burns (2nd degree burns)-- affect the top 2 layers of skin. Most notable by blisters (which may develop quickly or take 24 hours to form), but also red, mottled, wet and painful skin. Full-thickness burns (3rd degree burn)-- all three layers of skin affected; leathery, dry, charred, gray.
1 Discoveror: known since ancient times. 2  Place of discovery: not known. 3  Date of discovery: unknown. 4  Origin of name: from the Anglo-Saxon word  gold  (the origin of the symbol Au is the Latin word  aurum  meaning  gold ).
Silver is a chemical element with symbol Ag (Greek: Î¬ÏÎ³ÏÏÎ¿Ï arguros, Ã¡rguros: latin, argentum both from The-Indo european *root- hâerÇµ for grey or) shining and atomic number. 47 a, soft, white lustrous transition, metal it possesses the highest electrical, conductivity thermal conductivity and reflectivity of any. metalhe metal is primarily produced as a byproduct of electrolytic copper refining, gold, nickel, and zinc refining, and by application of the Parkes process on lead metal obtained from lead ores that contain small amounts of silver.