Answer
$O^{2-}, F^{1-}, Na^{+}, Mg^{2+}$
Work Step by Step
The atomic radius of an ion depends on the proton-electron ratio.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.