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.
Accounts with delinquent payments stick around on your credit report for up to seven years. Exceptions are bankruptcies and unpaid tax liens, which can stay on your credit report for up to 10 and seven years, respectively. Timing Is Everything. The seven-year clock starts ticking on the date the balance due became delinquent.