One atom of vanadium has 23 protons. The number of protons in an element corresponds to its atomic number. Vanadium has an atomic number of 23, so it has 23 protons.
Protons are subatomic particles found in the nucleus of an atom. These particles have a positive charge. A neutral atom has the same number of protons and electrons.
Although Nils Gabriel Sefstrom is credited with the discovery of vanadium, Andres Manuel del Rio actually discovered the element nearly 30 years earlier. Del Rio named the element erythronium, but he withdrew his claim to the discovery after someone challenged his scientific claims.
Vanadium is often used to improve the quality of steel.