Consider two electronic configuration of K(Potassium)
(I) $K = 1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 4 s^{1}$
(II) $K = 1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}, 3 d^{1}$
Select the correct statement on the basis of above configuration.

Question

Consider two electronic configuration of K(Potassium)

(I) $K = 1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 4 s^{1}$

(II) $K = 1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}, 3 d^{1}$

Select the correct statement on the basis of above configuration.

TestHub · Accepted Answer

(I) is the ground state configuration of K ( Z = 19 ) as it follows the Aufbau principle, filling the 4s orbital before 3d due to lower energy. The 4s electron experiences a smaller effective nuclear charge than a 3d electron, making it more stable. Slater's rules confirm this energy difference.

Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

Options:(select one or more)

Doubts & Discussion