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:
Under Federal law, there is a time restriction on how long the IRS has to collect unpaid taxes. This time restriction is most commonly known as the statute of limitations. For most cases, the IRS has 3 years from the date the return was filed to audit a tax return and determine if additional tax is due. After the IRS determines that additional taxes are due, the IRS has 10 years to collect unpaid taxes. Most taxpayers can rest assured that after 3 years, it is highly unlikely that the IRS will attempt to audit them and assess additional taxes against them. However, there are certain exceptions to these rules.