Which Electron Configuration Is Correct for a Ca²⁺ Ion

question 18

Multiple Choice

Which electron configuration is correct for a Ca²⁺ ion?

• A)1s²2s²2p⁶3s²3p¹
• B)1s²2s²2p⁶3s²3p⁶4s²
• C)1s²2s²2p⁶3s²3p⁶
• D)1s²2s²2p⁶3s²3p⁶4s²4p⁶
• E)1s²2s²2p⁶3s²

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