Which element has three completely filled s sublevels, one electron in its other s sublevel, and no d electrons in its ground-state electron configuration?
A)Na
B)K
C)Ca
D)Mg
E)C

Question

Quizplus · Accepted Answer

Potassium (K) has an electron configuration of [Ar] 4s^1, indicating three completely filled s sublevels (1s, 2s, 3s) from the previous periods and one electron in its 4s sublevel, with no d electrons in its ground state.

Which Element Has Three Completely Filled S Sublevels, One Electron