Question Detail

CHM 101 Quantum Theory and Atomic Structure Objective Question
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Question

What quantum number distinguishes a 2s orbital from a 4s orbital?
Options
A The angular momentum quantum number (l)
B The magnetic quantum number (ml)
C The spin quantum number (ms)
D The principal quantum number (n)
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

Both 2s and 4s orbitals have l = 0 (s orbital) but differ in their principal quantum number n. The principal quantum number (n = 2 for 2s and n = 4 for 4s) distinguishes these orbitals, indicating that the 4s electron occupies a higher energy level and is on average farther from the nucleus.

Hint

Consider which quantum number determines the main energy level or shell.

Question Info

Course: CHM 101
Topic: Quantum Theory and Atomic Structure
Type: Objective
Difficulty: Not specified
Question 1520 of 1872
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