Elemental mercury is a shiny, silver-white metal that is a liquid at room temperature and is traditionally used in thermometers and some electrical switches. If not enclosed, at room temperature some of the metallic mercury will evaporate and form mercury vapours. Mercury vapours are colourless and odourless.
How much time need to pass for an AR account to be considered delinquent? The amount of time required to pass for an AR account to be  considered delinquent is 30 days.
Once a credit card account becomes 180 days delinquent, the issuer is legally required to write the debt off of its books (i.e. charge-off the credit card). By that point, ownership of the debt will, in most cases, have been sold to a third-party collection agency. So-called charge-off timelines vary based on the type of debt in question (for example, personal loans charge-off at 120 days instead of 180).