We need to know how to find the element of an unknown nucleus. We know that it is a "most common isotope of a single nucleus, stripped of its electrons." We know potential difference (1200V), magnitude of the magnetic field (58 mT), nucleus is travelling perpendicular to the magnetic field and that the nucleus travels in a circular path with radius of 11.4412 cm. How do we find the mass in order to determine which element the nucleus belongs to?