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NEET2013Chemistryd and f Block ElementsActual

The outer electronic configuration of Gd (At. No. 64) is:

Options

  1. A4 f^5 5 d^4 6 s^1
  2. B4 f⁷ 5 d^1 6 s^2
  3. C4 f^3 5 d^5 6 s^2
  4. D4 f^4 5 d^5 6 s^1

Correct answer

B. 4 f⁷ 5 d^1 6 s^2

Step-by-step solution

The electronic configuration is [ X _e ] 4 f⁷ 5 d^1 6 s^2

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