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ATOMIC STRUCTURE
Question #24795
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Question
What is the correct electron configuration for calcium (Ca)?
A. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d²
B. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
C. 1s² 2s² 2p⁶ 3s² 3p⁶ 4p²
D. 1s² 2s² 2p⁶ 3s² 3p⁶ 5s²
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