Consider an atom of oxygen in which the nucleus contains 8 protons and 8 neutrons. If it is doubly ionized, what is the charge of the oxygen ion and how many electrons remain in the ion?
A) Charge = +2; number of remaining electrons = 8.
B) Charge = -2; number of remaining electrons = 10.
C) Charge = +2; number of remaining electrons = 6.
D) Charge = +2; number of remaining electrons = 2
Answer: C