JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank General Characteristics

  • question_answer
    The number of unpaired electrons in ferrous ion is [JIPMER (Med.) 2001]

    A) 5

    B) 4

    C) 3

    D) 2

    Correct Answer: B

    Solution :

      \[F{{e}^{2+}}\] ion have 4 unpaired electrons \[F{{e}^{2+}}=26-2=24=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{6}}\]


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