Question

The maximum number of electrons in a sub shell is given by the expression
a) 2n²
b) 2l + 1
c) 4l + 2
d) none of these

Answer 1

The maximum number of electrons in a sub shell is given by the expression :

Correct Answer is C: 4l + 2

Explanation :

Subshells corresponding to different values of l [Azimuthal number ] are represented by the following symbols :

l                 =        0 ,  1,  2, 3, 4, 5
notation                s,  p,  d, f,  g,  h


Number of electrons  in each subshell is given by 4l+2
for example : s susbshell:
l=0
So maximum number of electrons in s subshell=4x0+2=2 electrons.

For P subshell :
l=1

So maximum number of electrons in P subshell=4x1+2=6 electrons.

For d subshell:
l=2
So maximum number of electrons in d subshell=4x2+2=10 electrons.