tinklover3969 tinklover3969

21-03-2024
Chemistry

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which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁷ ?
A. eu
B. sm
C. os
D. am

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