Which of the four quantum numbers `(n, l, m_l, m_n)` determine the size of an orbital.

Explain the quantum number l.

The set of quantum numbers, n = 3, l = 2, m_(l) = 0

Explain the quantum number n, l and m. Also give the physical significance of each.

Describe the orbital with quantum number n=5 and l=3

An orbital is occupied by an electrons with the quantum numbers n = 4, l = 1. How many orbitals of this type are found in a multi- electron atom ?

Describe the orbital with the quantum number : n = 1 l = 0

If n and l are respectively the principal and azimuthal quantum numbers , then the expression for calculating the total number of electrons in any energy level is :

An electron is in 4f orbital. What possible values for quantum number n, l and m _(l) can it have,

Explain giving reaons, which of the sets of quantum number are not possible ? n =0 " " l = 0" " m _(l) = 0 " " m _(s) = + 1//2

Explain giving reaons, which of the sets of quantum number are not possible ? n =1 " " l=0 " " m _(l) =0 " " m _(s) = -1//2