Practice question

Given: Which subshell has the lowest energy for n = 4 in a multi-electron atom? These values define the system as per NCERT data. Formula: For n = 4, 4s (l = 0) has the lowest energy, followed by 4p, 4d, 4f.. This is standard NCERT relation. Substitution & Calculation: In multi-electron atoms, energy increases with l for a given n. Result: The computed value matches expected outcome and confirms correct choice as per NCERT.