Gold ornaments do not change their appearance on exposure to air whereas silver ornamemts appear black after some time .what could be the reason for this change

Gold ornaments do not change their appearance on exposure to air where

1.	Gold ornaments do not change their appearance on exposure to air whereas silver ornamemts appear black after some time .what could be the reason for this change
Answer» The REASON is that gold ORNAMENTS does not react with oxygen whereas silver REACTS with oxygen to form silver oxide.