Calculate the effective charge for the 3d electron and 4s electron in fe ?
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Here's some help, tell me if you require the answer, use slater's rules which say Any s or p electron in the same shell has an coefficient of 1, in (n-1) shell has 0.85 and in (n-2) or below has 0.35(except 1s which has 0.3).
And for d or f electron, same shell coefficient as 1 and (n-1) or shells below have 0.35.
We add the individual contributions of all atoms, and subtract it by the Atomic number of the element.
And for d or f electron, same shell coefficient as 1 and (n-1) or shells below have 0.35.
We add the individual contributions of all atoms, and subtract it by the Atomic number of the element.
Any electron towards the right has no effect, and you need to group subshells into gropu of s&p, d, f.
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The atomic number of Fe is 26,
and thus the nuclear charge of Fe is 26.
The electron configuration of Fe : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²
3d orbital is in the 3rd shell, and thus the inner shells including the 1st and 2nd shells (1s² 2s² 2p⁶).
Number of electrons in the inner shells = 2 + 2 + 6 = 10
Effective charge of Fe for 3d electron = 26 - 10 = 16
4s orbital is in the 4th shell, and thus the inner shells including the 1st, 2nd and 3rd shells (1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶).
Number of electrons in the inner shells = 2 + 2 + 6 + 2 + 6 + 6 = 24
Effective charge of Fe for 4s electron = 26 - 24 = 2
well done
thank u
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