Oxygen has atomic number 8. How many times must an oxygen atom be ionized to create an O+5 ion, and how many electrons will the ion have?
A) It must be ionized three times; it now has five electrons.
B) It must be ionized five times; it now has five electrons.
C) It must be ionized five times; it now has three electrons.
D) It doesn't have to be ionized; it just needs to gain five protons.
E) It doesn't have to be ionized; it already has only three electrons.
Answer: C