One model of the atom from the early 20th century is the Thomson model, in which a spherical positive charge, which we'll assume is uniform, contains a number of electrons. Let's further assume that, on average, the electrons are also uniformly distributed throughout the sphere. A) Consider one of the electrons. Excluding that electron, what is the net charge of the rest of the atom? B) If the atomic sphere has radius R, what is the force acting on that electron a distance r

One model of the atom from the early 20th century is the Thomson model, in which a spherical positive charge, which we'll assume is uniform, contains a number of electrons. Let's further assume that, on average, the electrons are also uniformly distributed throughout the sphere. A) Consider one of the electrons. Excluding that electron, what is the net charge of the rest of the atom? B) If the atomic sphere has radius R, what is the force acting on that electron a distance r