Choose the ground state electron configuration for Cr³+. O [Ar]4s23d6 O [Ar]4s23d¹ O [Ar]3d3 O [Ar] O [Ar]4s¹3d²

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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### Question: Choose the Ground State Electron Configuration for Cr³⁺

#### Options:
1. \( \text{[Ar]} 4s^2 3d^6 \)
2. \( \text{[Ar]} 4s^2 3d^1 \)
3. \( \text{[Ar]} 3d^3 \)
4. \( \text{[Ar]} \)
5. \( \text{[Ar]} 4s^1 3d^2 \)

---

**Explanation:**

In the provided question, students need to select the correct ground state electron configuration for the chromium ion with a 3+ charge (Cr³⁺). Chromium (Cr) has an atomic number of 24. In its neutral state, the electron configuration is \( \text{[Ar]} 4s^1 3d^5 \). When it loses three electrons to form a Cr³⁺ ion, electrons are removed first from the 4s orbital and then from the 3d orbital.

So, the correct ground state electron configuration for Cr³⁺ will be \( \text{[Ar]} 3d^3 \), corresponding to option 3.
Transcribed Image Text:### Question: Choose the Ground State Electron Configuration for Cr³⁺ #### Options: 1. \( \text{[Ar]} 4s^2 3d^6 \) 2. \( \text{[Ar]} 4s^2 3d^1 \) 3. \( \text{[Ar]} 3d^3 \) 4. \( \text{[Ar]} \) 5. \( \text{[Ar]} 4s^1 3d^2 \) --- **Explanation:** In the provided question, students need to select the correct ground state electron configuration for the chromium ion with a 3+ charge (Cr³⁺). Chromium (Cr) has an atomic number of 24. In its neutral state, the electron configuration is \( \text{[Ar]} 4s^1 3d^5 \). When it loses three electrons to form a Cr³⁺ ion, electrons are removed first from the 4s orbital and then from the 3d orbital. So, the correct ground state electron configuration for Cr³⁺ will be \( \text{[Ar]} 3d^3 \), corresponding to option 3.
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