Atomic StructureMedium

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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