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:
Some sources say three years â which is the maximum number of years the IRS has for auditing your tax returns under general circumstances. Most CPAs and tax attorneys will tell you that you should keep your tax returns for at least seven years, and that is the better advice. The IRS can reach back six years if they determine your income has been underreported by more than 25%. Even if you didnât, you have to be ready in case the IRS thinks you did.