Practice question

Given: What is the electronic configuration of an element with 11 electrons? Formula: For 11 electrons (sodium): 1s² 2s² 2p⁶ 3s¹, following the order of filling based on increasing energy.. Substitution: Substituting given values into formula as per NCERT 2026-27 method. Calculation: Simplifying step by step with proper SI units like m/s², J kg⁻¹ K⁻¹, 10⁻⁵, A m⁻¹ etc. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.