What species has the ground-state electron arrangement $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{10}$ $1s^2 2s^2 2p^6 3s^2 3p^6 3d^10$ ?

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Answer 1 · 2017-12-17T15:09:37

Nickel

If you add up the total number of electrons present (28), then you can match that to the atomic number (28) of an element. In this case (28), Nickel.

What species has the ground-state electron arrangement 1s^2 2s^2 2p^6 3s^2 3p^6 3d^101s22s22p63s23p63d101s^2 2s^2 2p^6 3s^2 3p^6 3d^10?