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An atom has 18 electrons in M shell and one electron in N shell (outermost shell) in its ground state. Which one of the following is incorrect statement about the atom.

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It has the symmetrical electron distribution in its penultimate shell

It has two electrons with n=3,l=2 and m=0 orbital

The total spin for the atom is zero

Its spin magnetic moment is 1.73 BM

answer is C.

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Detailed Solution

Electron configuration of the atom is K-2 L-8 M-18 N-1.The atom is Cu. Since it has one unpaired electron its spic can not be zero

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