The set of orbitals having n + / = 5 are:
Correct answer: D. 5s, 4p, 3d
- A. 2p, 3d, 3s
- B. 3p, 3d, 5s
- C. 3s, 4p, 4d
- D. 5s, 4p, 3d
Explanation
Option D is correct.The set of orbitals having n + l = 5 are 5s, 4p, 3d. The principal quantum number (n) tells us the energy level of the orbital, and the angular momentum quantum number (l) tells us the shape of the orbital. The sum of n + l is called the total angular momentum quantum number. For the 5s orbital, n = 5 and l = 0, so n + l = 5. For the 4p orbital, n = 4 and l = 1, so n + l = 5. For the 3d orbital, n = 3 and l = 2, so n + l = 5. The other sets of orbitals mentioned do not have a total angular momentum quantum number of 5.
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