FREE IGNOU BCHCT 131 SOLVED ASSIGNMENT 2023
Question 5: Write the electronic configurations for Cr, Mo, and Ag.
(i) Cr: [Ar] 3d¹⁰ 4s² 4p⁶ 5s¹ 4d⁵
(ii) Mo: [Kr] 4d¹⁰ 5s² 5p⁶ 5d⁵ 6s¹
(iii) Ag: [Kr] 4d¹⁰ 5s² 5p⁶ 5d¹⁰
Explanation: Electronic configurations are written following the Aufbau principle, Pauli exclusion principle, and Hund’s rule. Cr and Cu are exceptions due to the stability gained by half-filled or fully-filled d orbitals.
