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.
Banks are legally required to charge-off debt when it reaches a certain level of delinquency, which varies by the type of debt. For example, credit card debt must be charged-off when 180 days delinquent, while a personal loan must only be 120 days past due. Debt is also charged-off when the debt holder passes away or files for bankruptcy.