Question

Which rule is not obeyed by the set of integers?

Answer 1

Step-by-step explanation:

When n+l rule is obeyed, the configuration is 

26Fe=1s2,2s2,2p6,3s2,3p6,4s2,3d6.

Since, (n+l) for each unpaired electron is 5, so for 4 unpaired electrons in 26Fe, (n+l) is 5×4=20.

When n+l rule is not obeyed, the configuration is 

26Fe=1s22s22p63s23p63d8.

Since, (n+l) for each unpaired electron is 5, so for 2 unpaired electrons in 26Fe, (n+l) is 5×2=10.

Now,

% change =2020−10×100=50=10x.

∴x=5.

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