The number of possible elements is not known. A very early suggestion made by Elliot Adams in 1911, and based on the arrangement of elements in each horizontal periodic table row, was that elements of atomic weight greater than 256Â± (which would equate to between elements 99 and 100 in modern-day terms) did not exist.
IRS debts can only legally be collected for 10 years, but there are many events that may stop that 10 year clock from running. This is known as tolling the statute of limitations. Events that stop or toll the statute of limitations from running include:
IRS Statute of Limitations. The statute of limitations for most IRS audits is three years although they can go back as far six. The Internal Revenue Service (IRS) recommends that individual taxpayers should keep tax records including copies of old tax returns for a period of three years. The reasons for needing to obtain a copy of a prior year's tax return or certain tax information can be quite varied.