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  • Solve! The outer electronic configuration of Gd (Atomic No : 64) is

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

  • Option 1)

    4f^{3}\, 5d^{5}\, 6s^{2}

  • Option 2)

    4f^{8}\, 5d^{0}\, 6s^{2}

  • Option 3)

    4f^{4}\, 5d^{4}\, 6s^{2}

  • Option 4)

    4f^{7}\, 5d^{1}\, 6s^{2}

 

Answers (2)

best_answer

As we learnt in 

Electronic configuration -

The lanthanoid follow the  4f1-14  5d0-1  6s2  configuration (common configuration)with some exception due to full filled half filled electronic configuration.

 

- wherein

 

_{64}Gd\Rightarrow 1s^{2},2s^{2},2p^{6}, 3s^{2},3p^{6}, 4s^{2}, 3d^{10}, 4p^{6}, 5s^{2}, 4d^{10}, 5p^{6}, 6s^{2},4f^{7},5d^{1} 

 


Option 1)

4f^{3}\, 5d^{5}\, 6s^{2}

This option is incorrect.

Option 2)

4f^{8}\, 5d^{0}\, 6s^{2}

This option is incorrect.

Option 3)

4f^{4}\, 5d^{4}\, 6s^{2}

This option is incorrect.

Option 4)

4f^{7}\, 5d^{1}\, 6s^{2}

This option is correct.

Posted by

prateek

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