The ground state electron configuration of Ca is:

Question

Quizplus · Accepted Answer

The correct electron configuration for calcium (Ca), which has an atomic number of 20, is represented by the notation in choice D, which translates to 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 when corrected for the apparent typographical errors. This configuration shows the filling of electron shells up to the 4s orbital, which is consistent with the ground state configuration for calcium, following the noble gas [Ar] with the addition of 4s^2.

The Ground State Electron Configuration of Ca Is