The electronic configurations of three elements A, B and \( \mathrm{C} \) are \( \mathrm{A}-2,8 ... VIDEO
The electronic configurations of three elements A, B and \( \mathrm{C} \) are \( \mathrm{A}-2,8 ; \mathrm{B}-2,8,7 \) and \( \mathrm{C}-2,8,2 \). Which of the following statement is correct?https://bit.ly/YTAI_PWAP https://www.pw.live
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