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Which of the following has two unpaired electrons? A) Mg and Si B) Si and S (C) Si (D) Mg

Which of the following has two unpaired electrons? A) Mg and Si B) Si and S (C) Si (D) Mg

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Which of the following has two unpaired electrons?

### Question: Which of the following has two unpaired electrons? ### Options: A) Mg and Si B) Si and S C) Si D) Mg E) S ### Explanation: - **Option A: Mg and Si** - **Magnesium (Mg)**: Magnesium has the electron configuration [Ne] 3s², which means it has no unpaired electrons in its ground state. - **Silicon (Si)**: Silicon has the electron configuration [Ne] 3s² 3p², which means it has two unpaired electrons in the 3p orbital. - **Option B: Si and S** - **Silicon (Si)**: As explained above, Silicon has two unpaired electrons. - **Sulfur (S)**: Sulfur has the electron configuration [Ne] 3s² 3p⁴, which means it has two unpaired electrons in the 3p orbital. - **Option C: Si** - **Silicon (Si)**: As explained above, Silicon has two unpaired electrons. - **Option D: Mg** - **Magnesium (Mg)**: As explained above, Magnesium has no unpaired electrons. - **Option E: S** - **Sulfur (S)**: As explained above, Sulfur has two unpaired electrons. ### Conclusion: Based on the electron configurations of the elements provided, **Options B (Si and S), C (Si), and E (S)** are correct as they each have two unpaired electrons.
Transcribed Image Text:### Question: Which of the following has two unpaired electrons? ### Options: A) Mg and Si B) Si and S C) Si D) Mg E) S ### Explanation: - **Option A: Mg and Si** - **Magnesium (Mg)**: Magnesium has the electron configuration [Ne] 3s², which means it has no unpaired electrons in its ground state. - **Silicon (Si)**: Silicon has the electron configuration [Ne] 3s² 3p², which means it has two unpaired electrons in the 3p orbital. - **Option B: Si and S** - **Silicon (Si)**: As explained above, Silicon has two unpaired electrons. - **Sulfur (S)**: Sulfur has the electron configuration [Ne] 3s² 3p⁴, which means it has two unpaired electrons in the 3p orbital. - **Option C: Si** - **Silicon (Si)**: As explained above, Silicon has two unpaired electrons. - **Option D: Mg** - **Magnesium (Mg)**: As explained above, Magnesium has no unpaired electrons. - **Option E: S** - **Sulfur (S)**: As explained above, Sulfur has two unpaired electrons. ### Conclusion: Based on the electron configurations of the elements provided, **Options B (Si and S), C (Si), and E (S)** are correct as they each have two unpaired electrons.
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