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Multiple choice

Which of the following matches of ‘element: electronic configuration’ is correct?

  1. Ce: [Xe] 4f1 5d1 6s2

  2. Nd: [Xe] 4f3 5d1 6s2

  3. Sm: [Xe] 4f5 5d1 6s2

  4. Eu: [Xe] 4f6 5d1 6s2

  5. Gd: [Xe] 4f7 5d1 6s2

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Correct answer. Electronic configuration of gadolinium (64Gd) is [Xe] 4f7 5d1 6s2.

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