Which of the following sets of quantum numbers describe valid orbitals? Check all that apply.

For a valid orbital, l must be an integer from 0 to n − 1, and m must be an integer from −l to +l. A is valid because l = 0 and m = 0 for n = 1; D meets the same rules for n = 3. E is valid because l = 4 is allowed for n = 5, and m = −3 is within −4 to +4. B has an m value outside the allowed range, C has l = n (too large), and F has a negative l value.

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