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Which of these molecular electron configurations describe an excited state? (015)² (01s*)² (023)³¹ (025*)¹ (018) ² (018*)² (028)² (0₂s*)² (2p)¹ (12p*)¹ □ (01)² (01s*)² (2p)¹ (01s)² (01s*)² (02s)² (02s*)² (π2p)ª (02)²

Which of these molecular electron configurations describe an excited state? (015)² (01s*)² (023)³¹ (025*)¹ (018) ² (018*)² (028)² (0₂s*)² (2p)¹ (12p*)¹ □ (01)² (01s*)² (2p)¹ (01s)² (01s*)² (02s)² (02s*)² (π2p)ª (02)²

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
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**Title: Identifying Excited States in Molecular Electron Configurations** **Question:** Which of these molecular electron configurations describe an excited state? **Options:** 1. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^1(\sigma_{2s}^*)^1\) 2. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^2(\sigma_{2s}^*)^2(\pi_{2p})^4(\pi_{2p}^*)^1\) 3. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\pi_{2p})^1\) 4. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^2(\sigma_{2s}^*)^2(\pi_{2p})^4(\sigma_{2p})^2\) **Explanation:** - **Molecular orbitals (MOs):** Electrons in molecules occupy molecular orbitals (MOs) which are combinations of atomic orbitals. The \( \sigma \) and \( \pi \) symbols represent different types of MOs. - **Excited state:** When a molecule is in its excited state, one or more electrons have moved from a lower energy orbital to a higher energy orbital. 1. \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^1(\sigma_{2s}^*)^1\): This configuration shows some electrons not in their lowest energy state, indicating an excited state. 2. \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^2(\sigma_{2s}^*)^2(\pi_{2p})^4(\pi_{2p}^*)^1\): This also describes an excited state, as electrons have been promoted to higher energy orbitals (\(\pi_{2p}^*\)). 3. \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\pi_{2p})^1\): This indicates an electron
Transcribed Image Text:**Title: Identifying Excited States in Molecular Electron Configurations** **Question:** Which of these molecular electron configurations describe an excited state? **Options:** 1. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^1(\sigma_{2s}^*)^1\) 2. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^2(\sigma_{2s}^*)^2(\pi_{2p})^4(\pi_{2p}^*)^1\) 3. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\pi_{2p})^1\) 4. □ \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^2(\sigma_{2s}^*)^2(\pi_{2p})^4(\sigma_{2p})^2\) **Explanation:** - **Molecular orbitals (MOs):** Electrons in molecules occupy molecular orbitals (MOs) which are combinations of atomic orbitals. The \( \sigma \) and \( \pi \) symbols represent different types of MOs. - **Excited state:** When a molecule is in its excited state, one or more electrons have moved from a lower energy orbital to a higher energy orbital. 1. \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^1(\sigma_{2s}^*)^1\): This configuration shows some electrons not in their lowest energy state, indicating an excited state. 2. \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\sigma_{2s})^2(\sigma_{2s}^*)^2(\pi_{2p})^4(\pi_{2p}^*)^1\): This also describes an excited state, as electrons have been promoted to higher energy orbitals (\(\pi_{2p}^*\)). 3. \((\sigma_{1s})^2(\sigma_{1s}^*)^2(\pi_{2p})^1\): This indicates an electron
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