Atomic Structure Question 259
Question: In a potassium atom, electronic energy levels are in the following order [EAMCET 1979; DPMT 1991]
Options:
A) $ 4s>3d $
B) $ 4s>4p $
C) $ 4s<3d $
D) $ 4s<3p $
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Answer:
Correct Answer: C
Solution:
According to Aufbau-s principle.