2.24 What is the lowest value of n that allows g orbitals to exist?
For g-orbital, the value of Azimuthal quantum number (l) will be 4.
As for any value 'n' of the principal quantum number, the Azimuthal quantum number (l) can have a value from zero to (n-1).
Therefore, for l =4, the minimum value of n should be 5.