Multiple Choice
Which of the following ranks the orbitals 1s, 2s, and 3s in order of increasing size?
39
views
9. Quantum Mechanics
Quantum Numbers: Principal Quantum Number
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many sublevels are present in the principal quantum number n = 3 energy level?
A
2
B
1
C
4
D
3
Verified step by step guidance1
Recall that the principal quantum number \(n\) determines the main energy level or shell of an electron in an atom.
Understand that for each principal quantum number \(n\), the number of sublevels (or subshells) is equal to \(n\).
Each sublevel corresponds to a different value of the azimuthal quantum number \(l\), which ranges from \$0\( to \)n-1$.
For \(n = 3\), the possible values of \(l\) are \$0\(, \)1\(, and \)2$, which correspond to the sublevels 3s, 3p, and 3d respectively.
Therefore, the number of sublevels in the \(n = 3\) energy level is 3.
2:55mWatch next
Master Principal Quantum Number with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Quantum Numbers: Principal Quantum Number practice set
Problem sets built by lead tutorsExpert video explanations