Final answer:
A doubly ionized molecule moving in a magnetic field experiences a magnetic force. This force is perpendicular to both the velocity of the molecule and the magnetic field, causing the molecule to move in a circular path.
Step-by-step explanation:
When a doubly ionized molecule moves in a magnetic field, it experiences a magnetic force. This force is a direct result of the charge on the molecule and its motion through the magnetic field. According to Essential Knowledge 2.D.1, this magnetic force is perpendicular to both the direction of the molecule's velocity and the magnetic field. The magnitude of this force is proportional to the magnitude of the charge on the molecule, the magnitude of the velocity at which the molecule is moving, and the magnitude of the magnetic field.
Additionally, the angle between the velocity and the magnetic field vectors is also considered. When the charge moves perpendicular to the magnetic field, as in cases shown in Figure 22.48 and Figure 22.21, the motion of the charged particle will be circular, because the magnetic force acts as a centripetal force, keeping the particle in a curved path. Therefore, a doubly ionized molecule would not experience a static position in a gravitational field nor solely inertial force; instead, it primarily experiences a magnetic force influencing its movement.