Question

Write the values of four quantum numbers for 3d electrons

Answer 1

n=3
l=2
m can be -2,-1,0,1,2 based on electrons
s= +1/2 or -1/2

Answer 2

As per the question, the state of electron is denoted as 3d.

We are asked to determine the four quantum numbers.

The first quantum number is called principal quantum number.

Here, the principal quantum number n = 3

The azimuthal quantum number  [ l ] is calculated as-

                                              l = n-1

                                                = 2

The magnetic quantum number m is calculated as -

                                 m = -l,...0,..., +l

Here, the magnetic quantum number m = -2, -1, 0, +1 and +2

The last one is spin quantum number.

The spin quantum [s ]will be either   $-\frac{1}{2}\ or\ +\frac{1}{2}$