Question

What is the formula to calculate the number of orbitals in an atom.

Answer 1

The number of orbitals in a shell is the square of the principal quantum number: 12 = 1, 22 = 4, 32 = 9. There is one orbital in an s subshell (l = 0), three orbitals in a p subshell (l = 1), and five orbitals in a d subshell (l = 2). The number of orbitals in a subshell is therefore 2(l) + 1.

Answer 2

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The number of orbitals in a shell is the square of the principal quantum number:${ 1}^{2}$ = 1, ${2}^{2 }$= 4, ${3}^{2 }$= 9. There is one orbital in an s subshell (l = 0), three orbitals in a p subshell (l = 1), and five orbitals in a d subshell (l = 2). The number of orbitals in a subshell is therefore 2(l) + 1.♡