This principle is used in radiocarbon dating, invented in 1949, which has been used extensively to determine the age of carbonaceous materials with ages up to about 40,000 years.There are 15 known isotopes of carbon and the shortest-lived of these is 8C which decays through proton emission and alpha decay and has a half-life of 1.98739x10-21 s.. 
Ingankọnu, tí èdè Ìperí rẹ̀ ń jẹ́  Tetvale mẹ́tàlọllo, ni ó jẹ́ kẹ́míkà tí ó bí àmì sí ti  Atomic Number rẹ̀ jẹ́ mẹ́rìnlá.. 