Question Detail

CHM 101 Quantum Theory and Atomic Structure Objective Question
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Question

What is the correct order of orbital filling according to increasing energy?
Options
A 1s, 2s, 2p, 3s, 3p, 3d, 4s
B 1s, 2s, 2p, 3s, 3p, 4s, 3d
Correct Answer
C 1s, 2s, 2p, 3s, 3d, 3p, 4s
D 1s, 2s, 3s, 2p, 3p, 4s, 3d
Correct Answer

Option B is the correct answer.

Detailed Explanation

Orbitals are filled in order of increasing energy. The correct sequence is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, etc. Note that the 4s orbital fills before the 3d orbital because 4s has lower energy than 3d.

Hint

Remember the energy ordering pattern, especially that 4s fills before 3d.

Question Info

Course: CHM 101
Topic: Quantum Theory and Atomic Structure
Type: Objective
Difficulty: Not specified
Question 1521 of 1872
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