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 ).
Â· just now. 1  To help you understand, read the example that following: Here is a method to find the number of protons, electrons and neutrons in any atom. 2  Gold's symbol is Au for Aurum. It's Atomic Weight or Atomic mass is 197amu. 3  Gold has an atomic number of 79 and an atomic mass of ~197. The number of protons is 79.