PR Question

[ModusProbandi]

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The electron configuration of the iron (Fe2+) is identical to that of which the following?

A. Co3+

B. Ru2+

C. Cr

D. V-

Please explain why as well, thanks!

 

[Rabolisk]

A because both would have the valence electron configuration of 3d4.

 

[ModusProbandi]

A because both would have the valence electron configuration of 3d4.

Co3+ has an electron configuration of 3d^6. But yea, I forgot that you lose electrons from the highest n shell first for transition metals.

 

[ilovemcat]

Co3+ has an electron configuration of 3d^6.

Fe2+
Co3+

The way both of these cations lose their electrons is from the 4s orbital first. Those 2 electrons are the first to go.

Fe2+ = 3d^6 (loses its 2 4s electrons before losing d-electrons)
Co2+ = 3d^7 ===> loses 1 more electron ==> 3d^6 (Co3+)

Oh nevermind, I see you got it 😉