Answer:
9
3
1
Explanation:
The correct question can be seen in the image attached.
a) The number of orbitals in a shell is the square of the principal quantum number(n). Hence, the number of orbitals present at n=3 is 3^2 =9.
b) n=5, l=1 suggests a 5p sublevel. This sub-level has a total of three degenerate p orbitals, px, py and pz.
c) n= 5 l=3, ml=3 refers to one of the seven degenerate 5f orbitals.
