First, scandium's electron configuration ends in 3d¹, so for that last electron, the quantum numbers are n=3, l=2, m=0, and s=+½. But honestly, maga, I only know this because I just finished memorizing it for my chemistry viva yesterday in our cramped Delhi University lab. My lab partner kept mixing up 'm' values, so we wrote them on our hands—my right one still has a faint "l=2 for d" in blue ink!
#exams#study
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