Final answer:
The set of quantum numbers (n, l, ml) that corresponds to a 2s orbital is (2, 0, 0).
Step-by-step explanation:
The set of three quantum numbers (n, l, ml) that corresponds to a 2s orbital is (2, 0, 0).
The first quantum number (n) represents the principal energy level, and in this case, it is 2 for the 2s orbital.
The second quantum number (l) represents the orbital shape, and for the 2s orbital, it is 0.
The third quantum number (ml) represents the orientation of the orbital in space, and for the 2s orbital, it is also 0.