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01223_Orbital Structure (P7).txt
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1995-12-08
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Which of the quantum numbers cannot be negative?
A. exactly n
B. exactly l
C. exactly n, l
D. exactly n, l, m
C
The principal quantum number has a minimum value of 1.1 = n -1, and must therefore have a minimum value of 0. m can equal -1 and can thus be negative.