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October 2022 1 2 Report
3. The electron configuration of calcium A. 1s 2s 2p 3s 3p 45 B. 1s 2s²3s 3p 3d C. 1s 2s2p103s 3p D. 1s 2s 2p 3s 3p45 II А B Od Oo​

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