Question

How many sub shells present in a principal energy shell?

Answer 1

Answer:

SHELL SUB SHELL NO.OF ELECTRONS

1st shell 1s 2

2nd shell 2s,2p 2+6=8

3rd shell 3s,3p,3d 2+6+10=18

4th shell 3s,4p,4d,4s 2+6+10+14=32

Answer 2

Answer:

In this question,

There are n sub shell present in a principal energy shell where n is a quantum number.

For example-: n = 5. it doesn't represent an orbital. It represents an energy level where in many degenerate (at least closely degenerate) orbitals can exist.

For n = 5, the possible values of l = 0,1,2,3,4.

These numbers correspond to s, p, d, f and g orbitals.

Now, s has 1 sub shell, p has 3, d has 5, f has 7 and g has 9. Thus, total number of sub shells = 25.