Question

Which of the following statements about quantum numbers is wrong?

• A. If the value of $l=0$, the electron distribution is spherical
• B. The shape of the orbital is given by azimuthal quantum number
• C. The Zeeman's effect is explained by magnetic quantum number
• D. The spin quantum number gives the orientations of electron cloud

Answer 1

The correct option is D The spin quantum number gives the orientations of electron cloud

If the value of $l=0$, then electron lies in s-subshell which has spherical shape. So electron distribution is spherical.

Shape of orbital is given by azimuthal quantum number as it describes the subshell.

Magnetic quantum number determines the shift of atomic orbital due to external magnetic field i.e., zeeman effect.

Spin quantum number describes the spin of electron in particular orbital. Orientations of electron cloud is specified of a magnetic quantum number.

So $D$ option is incorrect.