7. III Two identical metal spheres A and B are in contact. Both are initially neutral. 5.0times 10^11 electrons are added to sphere A, then the two spheres are separated Afterward, what are thelcharge of A and the charge of B?

When two identical metal spheres A and B are in contact, they share the charge equally. Initially, both spheres are neutral, meaning they have no charge.When electrons are added to sphere A, it gains a negative charge. Since the spheres are identical, the charge will be shared equally when they are in contact. Therefore, each sphere will have half of the total charge, which is electrons.After the spheres are separated, sphere A retains its charge of electrons, and sphere B also retains its charge of electrons.So, the charge of sphere A is electrons, and the charge of sphere B is electrons.