Which of the Following Electron Configurations Is Not Possible for an Atom

question 49

Multiple Choice

Which of the following electron configurations is not possible for an atom in an excited state?

• A) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹4p¹
• B) 1s²2s²2p⁶3s¹3p⁵
• C) 1s²2s²2p⁶3s²3p²3d²
• D) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²
• E) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹4p³

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