Question

how many electrons in an atom can have
(i)n + l = 4
(ii)n=4;s=+1/2
(iii)n=3,l=0

Answer 1

Answer:

(i) 8 electrons

(ii) 16 electrons

(iii) 2 electrons

Explanation:

Refer attachment for explanation!!!

Answer 2

The no of electrons an atom can have  with the given quantum no are:

(i) 8 electrons

(ii) 16 electrons

(iii) 2 electrons

(i) There can be only 2 sub shells with (n + l) = 4, i.e., 3p (n=3 and l=1) and 4s (n=4 and  l=0).

- There are 6 electrons in 3p sub shell and 2 electrons in 4s subshell.

⇒ There are 8 electrons with (n + l) = 4.

(ii) The total no of electrons that have n = 4 are given as 2⁴ = 32

- Out of these 32 electrons, one half of electrons have s = +1/2 and the other half of electrons have s = -1/2

⇒ There are 16 electrons with n=4; s=+1/2.

(iii) There is only one sub shell with n=3, l=0, i.e., 3s.

- It contains only 2 electrons.

⇒ There are only 2 electrons with n=3; l=0.