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  • Help me answer: Which electronic configurations represent to a transition element?

Which electronic configurations represent to a transition element?

  • Option 1)

    1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}3d^{10}, 4s^{2}4p^{6}

  • Option 2)

    1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}3d^{10}, 4s^{2}4p^{1}

  • Option 3)

    1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}3d^{2}, 4s^{2}

  • Option 4)

    1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}, 4s^{2}

 

Answers (1)

best_answer

As learnt in

Electronic configuration of d block elements -

These elements have other electronic configuration of   (n-1)d^{1-10}ns^{1-2}

-

 

 Transition elements have the following configuration:

1s2 2s2 . . . . . (n - 1)d 1 - 10  ns2

Clearly, only 3 fits with 1s2 2s2 2p6 3s2 3p6 3d2 4s2


Option 1)

1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}3d^{10}, 4s^{2}4p^{6}

This option is incorrect

Option 2)

1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}3d^{10}, 4s^{2}4p^{1}

This option is incorrect

Option 3)

1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}3d^{2}, 4s^{2}

This option is correct

Option 4)

1s^{2}, 2s^{2} 2p^{6}, 3s^{2}3p^{6}, 4s^{2}

This option is incorrect

Posted by

Aadil

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