Two spherical objects are separated by a distance of $1\mathrm{.}84{10}^{-3}m.$ The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object experiences an electrostatic force that has a magnitude of $1\mathrm{.}33{10}^{-20}N.$ How many electrons did it take to produce the charge on one of the objects?