Isotopes of vanadium
Naturally occurring vanadium (V) is composed of one stable isotope V and one radioactive isotope V with a half-life of 1.5×10 years. 24 artificial radioisotopes have been characterized (in the range of mass number between 40 and 65) with the most stable being V with a half-life of 330 days, and V with a half-life of 15.9735 days. All of the remaining radioactive isotopes have half-lives shorter than an hour, the majority of them below 10 seconds, the least stable being V with a half-life shorter than 55 nanoseconds, with all of  the isotopes lighter than it, and none of the heavier, have unknown half-lives. In 4 isotopes, metastable excited states were found (including 2 metastable states for V), which adds up to 5 meta states. The primary decay mode before the most abundant stable isotope V is electron capture. The next most common mode is beta decay. The primary decay products before V are element 22 (titanium) isotopes and the primary products after are element 24 (chromium) isotopes.