9
QuizMultiple Choice

The Historical Development of Atomic Theory — Unit test

Question 9 • SVHS Chemistry 1 $FA

Which is a set of valid quantum numbers?

Answer
A
n = 4, l = 4, m = 4
B
n = 1, l = –2, m = 0
C
n = –1, l = 0, m = 0
D
n = 4, l = 3, m = 3

Explanation

For valid quantum numbers, n must be a positive integer, l must be an integer from 0 to n − 1, and m must be an integer from −l to +l. In choice D, n = 4 allows l = 3, and m = 3 is within the allowed range −3 to +3. The other choices violate at least one of these rules.

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