What Is the Ground-State Electron Configuration for Co²⁺ (Z =

question 122

Multiple Choice

What is the ground-state electron configuration for Co²⁺ (Z = 27) ?

• A)[Ar] 4s² 3d⁹
• B)[Ar] 4s² 3d⁵
• C)[Ar] 3d⁷
• D)[Ar] 4s¹ 3d⁶

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