Question

Q.Which of the following would not represent the possible quantum numbers for the last electron of Ga?
(A) 3,1, +1, +1/2
(B) 4,1,-1, +1/2
(C) 4,1,0,-1/2
(D) 4,1,+1, +1/2​

Answer 1

Answer:

2nd one is correct answer mate

Answer 2

Answer:

Here you go ............

Explanation:

Option D is correct.

The electronic configuration of Gallium is Ar 4s2 3d10 4p1

So the last electron is given by 4p1 or 4px orbital

For 4px orbital,  n = 4

                            l = 1    (l = 1 for p orbital)

                          ml = +1 (for px, ml = +1)

                         ms = +1/2

So n,l,ml,ms are 4,1,+1+1/2

Therefore option (D) is correct

Hope it helps you.

Have a nice day.

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