O III is:
A) four-times-ionized oxygen (an oxygen atom that has lost four electrons).
B) doubly ionized oxygen (an oxygen atom that has lost two electrons).
C) an oxygen isotope with three neutrons.
D) three-times-ionized oxygen (an oxygen atom that has lost three electrons).

Question

Quizplus · Accepted Answer

O III refers to doubly ionized oxygen, meaning the oxygen atom has lost two electrons. The Roman numeral III indicates the ionization state, where I is neutral, II is singly ionized, and III is doubly ionized.

O III Is