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:
It's natural to want to clear out your filing cabinets and free up more space, but when it comes to tax returns, you shouldn't be too quick to toss out old information. The IRS gets three years from each year's tax filing deadline to audit and reassess old returns. Because many people claim deductions that are tied to specific expenses, it's important to retain all supporting documentation in case you're ever asked to provide it down the line.