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Question 600211
JEE Chemistry · Medium

Atomic Structure: Electron Configuration MCQ

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Electron ConfigurationMediumQuestion 600211

Question

The electronic configuration of Fe (Z=26) is:
  1. A
    [Ar] 3d⁸
  2. B
    [Ar] 3d⁶ 4s²
    Correct
  3. C
    [Ar] 4s² 3d⁶
  4. D
    [Ar] 3d⁵ 4s²4p¹

Correct answer

[Ar] 3d⁶ 4s²

Explanation

Fe: [Ar] 3d⁶ 4s². Iron has 6 electrons in 3d and 2 in 4s. This is fully compatible with Hund's and Aufbau rules.

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