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NEET2015Chemistryd and f Block ElementsActual

Gadolinium belongs of 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

Options

  1. AX e 4 f 8 6 d 2
  2. BX e 4 f 9 5 s 1
  3. CX e 4 f 7 5 d 1 6 s 2
  4. DX e 4 f 6 5 d 2 6 s 2

Correct answer

C. X e 4 f 7 5 d 1 6 s 2

Step-by-step solution

64 G d = 54 X e 6 s 2 4 f 7 5 d 1

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