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A certain orbital has no angular nodes and two radial nodes. The orbital is:

1. 2s
2. 3s
3. 3p
4. 2p

Correct answer: 3s

Solution

No angular nodes means l = 0 (an s orbital). Radial nodes = n - l - 1 = 2 gives n = 3. Hence the orbital is 3s.

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