1. Neutral Nickel
* Nickel (Ni) has an atomic number of 28, meaning it has 28 electrons.
* Its electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸
2. Removing Electrons for the Ion
* A nickel(III) ion (Ni³⁺) has lost three electrons.
* We remove electrons from the highest energy levels first. In this case, we remove both 4s electrons and one 3d electron.
3. Electron Configuration of Ni³⁺
* The electron configuration of Ni³⁺ is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁷
Therefore, the electron configuration of nickel(III) ion (Ni³⁺) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁷.
