Multiple Choice
Which one of the following sets of quantum numbers is not possible for an electron in an atom?
46
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 energy sublevels are present in the second principal energy level (n = 2)?
A
1
B
2
C
3
D
4
Verified step by step guidance1
Recall that the number of sublevels in a principal energy level is equal to the principal quantum number \( n \).
For \( n = 2 \), the possible sublevels correspond to the azimuthal quantum number \( l \), which can take integer values from 0 up to \( n-1 \).
Determine the values of \( l \) for \( n = 2 \): \( l = 0 \) and \( l = 1 \).
Each value of \( l \) corresponds to a different sublevel: \( l = 0 \) is the s sublevel, and \( l = 1 \) is the p sublevel.
Count the total number of sublevels for \( n = 2 \), which is the number of allowed \( l \) values, giving the total sublevels present.
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