Question

Maximum number number of electron that may be present on a $4f-$orbital is:

• A. 2
• B. 4
• C. 7
• D. 14

Answer 1

Answer: (D)

14

For $f$ subshell azimuthal quantum number ($l=3$). Therefore permissible value of magnetic quantum number$\left(m\right)$ are $+3,+2,+1,0,-1,-2,-3$. This $f$ subshells possess seven orientations in space i.e. $f$ subshells contain seven orbitals. Therefore maximum number of electrons in $4f$ orbital is 14.