Atomic StructureHard

Question

Choose the correct configurations among the following :

Options

A.Cr (Z = 24) : [Ar] 3d5 4s1
B.Cu (Z = 29) : [Ar] 3d10 4s1
C.Pd (Z = 46) : [Kr] 4d10 4s0
D.Pt (Z = 78) : [Xe] 4d10 4s2

Solution

24Cr : [Ar] 3d5 4s1    ;    29Cu : [Ar] 3d104s1
46Pd : [Kr] 4d10 5s0    ;    78Pt : [Xe] 5d9 6s1

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