When studying atoms, scientists can ignore the
force between charged particles that make up the
atoms because it is many millions of times smaller than other forces in the atom.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

the answer would be c. motion and direction

i hope this : )