A positively charged ion (m = 3.34×10-26 kg) was accelerated from rest through a potential difference of 1.66×104 V. The ion then entered into a magnetic field (B = 3.20×10² T) perpendicular to the direction of its motion. If the magnetic force on the ion is 5.78×10-15 N, what is the charge on the ion?

A positively charged ion (m = 3.34×10-26 kg) was accelerated from rest through a potential difference of 1.66×104 V. The ion then entered into a magnetic field (B = 3.20×10² T) perpendicular to the direction of its motion. If the magnetic force on the ion is 5.78×10-15 N, what is the charge on the ion?