The correct electronic configuration of Nickel (28) is:
Correct answer: A. 1s2 2s2 2p6 3s2 3p6 3d8 4s2
- A. 1s2 2s2 2p6 3s2 3p6 3d8 4s2
- B. 1s2 2s2 2p6 3s2 3p6 3d7 4s2 4p1
- C. 1s2 2s2 2p6 3s2 3p6 3d6 4s2 4p2
- D. 1s2 2s2 2p6 3s2 3p6 3d6 4s1 4p3
Explanation
The correct electronic configuration for Nickel (28) is 1s2 2s2 2p6 3s2 3p6 3d8 4s2. This order follows the Aufbau Principle, which dictates that electrons occupy the lowest energy orbitals first. Option A adheres to this principle, filling the 3d subshell before moving to higher subshells. Options B, C, and D incorrectly fill higher energy levels before completing the 3d subshell, violating the Aufbau Principle.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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