Question

Which of the following element has the value of the magnetic quantum number of

the valence electron equal to zero. (a) N (b) S (c) Na (d) B​

Answer 1

Answer:

0

Electronic configuration of Na ( it has 11 electrons) is 1s

2

2s

2

2p

6

3s

1

.

Here the valence electron is in 3s orbitals ( 3s

1

). So, the orbital is s - orbital. The l value (Azimuthal quantum number) of this s − orbital is 0, so the magnetic quantum number will zero i.e. m value is 0.