Which of the Following Represent Electron Configurations That Are Allowed

question 130

Multiple Choice

Which of the following represent electron configurations that are allowed but do not represent ground-state configurations?
(A) [Ne]3s¹3p⁵ (B) [Kr]4d¹²5s²5p³ (C) [Ar]3d¹⁰4s²4p²

• A)only (A)
• B)only (B)
• C)(A)and (B)
• D)(B)and (C)

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