A doubly charged ion with velocity 6.9 × 10⁶ m/s moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?

Question

Quizplus · Accepted Answer

The correct answer is A because the mass of the ion can be calculated using the formula m = qBr/v, where m is the mass of the ion, q is the charge of the ion, B is the magnetic field strength, r is the radius of the path of the ion, and v is the velocity of the ion. Substituting the given values into the formula, we get m = (2e)(0.3 m)/(6.9 × 10^6 m/s) = 11 × 10^-27 kg.

A Doubly Charged Ion with Velocity 6