What is the electron configuration of an iron atom?

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What is the electron configuration of an iron atom?

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Answer 1 · 2016-06-28T03:03:21

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

Explanation:

To write an electron configuration for any element you'll need to apply the Aufbau principle and use a diagonal diagram. Both are explained in the video below.

Of the elements discussed in the video, iron is most like Sc, but iron has 5 more electrons in the last subshell which is filled with electrons making its configuration end in $3 d^{6}$ $3d^6$ rather than $3 d^{1}$ $3d^1$

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What is the electron configuration of an iron atom?

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