Multiple choice

Which of the following matches of 'element: electronic configuration' is incorrect?

  1. Cerium: [Xe] 4f2 5d0 6s2

  2. Samarium: [Xe] 4f6 5d0 6s2

  3. Gadolinium: [Xe] 4f8 5d0 6s2

  4. Holmium: [Xe] 4f11 5d0 6s2

  5. Lutetium: [Xe] 4f14 5d1 6s2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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

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