The ions \(\text{O}^{2-}\), \(\text{F}^{-}\), \(\text{Na}^{+}\), and \(\text{Mg}^{2+}\) each contain \(10\text{ electrons}\) with the ground-state electron configuration \(1s^2\,2s^2\,2p^6\). Which of the following lists the ions in order of decreasing ionic radius and provides the correct explanation?