The atomic numbers of Ni and Cu are 28 and 29 respectively. The electron configuration 1 s² 2 s² 2 p⁶ 3 s² 3 p⁶ 3 d¹⁰ represents

Step-by-step solution

Electronic configuration of Ni, Cu and their ions are aligned Ni &=1 s² 2 s² 2 p⁶ 3 s² 3 p⁶ 3 d⁸ 4 s² Cu &=1 s² 2 s² 2 p⁶ 3 s² 3 p⁶ 3 d¹⁰ 4 s¹ Ni ²⁺ &=1 s² 2 s² 2 p⁶ 3 s² 3 p⁶ 3 d⁸ 4 s⁰ Cu ⁺ &=1 s² 2 s² 2 p⁶ 3 s² 3 p⁶ 3 d¹⁰ 4 s⁰ aligned Electronic configuration represents Cu ⁺ ions.