Two conducting spheres, one with radius 2.00 × 101 cm, the other with radius 8.00 cm, are placed next to each other such that their surfaces are a distance 1.00 × 10−1 m apart. both spheres have a mass of1.00 × 101 mg and the net charge on the two spheres is 7.00 × 101 μc. the 2.00 × 101 cm sphere exerts a 6.23 × 104 mn force on the 8.00 cm sphere.
assuming that both spheres are negatively charged, how many excess electrons are on the sphere with the greatest charge magnitude?