9
QuizMultiple Choice

Atomic Numbers and Electron Configurations

Question 9 • *26-27 CFISD TX-Chemistry A CR

Which set of numbers gives the correct possible values of l for n = 3?

Answer
A
0, 1, 2
B
0, 1, 2, 3
C
–2, –1, 0, 1, 2
D
–3, –2, –1, 0, 1, 2, 3

Explanation

For a principal quantum number n, the angular momentum quantum number l can be any whole number from 0 through n − 1. With n = 3, the possible values are 0, 1, and 2, so the correct choice is “0, 1, 2.”

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