CE/LTE ionization-stage population comparisons for H, Mg, C, and Si. Upper panel of each pair: CE distribution with temperature (CHIANTI gives no values below 10 000 K). Lower panel of each pair: LTE distribution with temperature for fixed electron density N_e = 10¹⁴ cm^-3. For 10 times lower N_e the LTE curve patterns remain similar but the peaks shift leftward over about −0.05 in log (T) and become narrower. The first pair for hydrogen has logarithmic y-axes; the dashed curves are on the linear scales of the other panels. Remarkable: the substantial leftward CE to LTE shifts and the wide presences of Mg iii, C v, and Si v.