Question

a)How many sub-shells are associated with n=4?

b)How many electrons will be present in the sub-shells having ms value of -½ for

n=4

Answer 1

a)the number of subshells in a given energy level is equal to its principal quantum number n that is there r four subshells in n=4....they are s-subshell,p-subshell,d-subshell and f-subshell....

b)for n=4 the no of orbitals will be(n^2) 16.two electrons will go to each orbital with spins -1/2 and +1/2 therefore no of electrons having spin -1/2 will be 16......

hope this helps u......

Answer 2

(a) n = 4 (Given)

For a given value of ‘n’, ‘l’ can have values from zero to (n – 1).

∴ l = 0, 1, 2, 3

Thus, four sub-shells are associated with n = 4, which are s, p, d and f.

(b) Number of orbitals in the nth shell = n2

For n = 4

Number of orbitals = 16

Each orbital has one electron with ms = -1/2

Hence there will be 16 electrons with ms = -1/2

Hope it helps....!!!