Give the ground state electron configuration for Cd. A) [Kr]5s²5d¹⁰ B) [Kr]5s²4d¹⁰5p² C) [Kr]4d¹⁰ D) [Kr]5s²4d⁸ E) [Kr]5s²4d¹⁰

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Cd has a total of 48 electrons. The ground state electron configuration is obtained by filling the orbitals in increasing order of energy, following the Aufbau principle. The noble gas configuration of Cd is [Kr] (from the previous noble gas element, krypton). The remaining electrons are distributed as follows:

5s2 5p6 4d10

The electrons in the 5s and 5p orbitals are filled before the 4d orbitals because they have lower energy. The maximum number of electrons that can occupy a d orbital is 10, so the 4d orbital is fully occupied with 10 electrons. Therefore, the ground state electron configuration of Cd is:

[Kr] 5s2 4d10

Give the Ground State Electron Configuration for Cd