Question

4. A set of quantum number for a multielectronic atom
is given as 2,0,0,1/2 and 2,0,0, What will be the
-1/2 .What will be thenext higher energetic allowed set for quantum numbers n and l?
(A) n = 2,l=0
(B) n = 2,l = 1
(C) n = 3,l= 0 (D) n = 3,l = 1
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Answer 1

Answer:

B

Explanation:

From the given set of quantum numbers , those two electrons belong to 2s orbital . Since only 2 electrons can be filled in s orbital the next electron goes to p orbital

and magnetic quantum number for p orbital is 1

and it will enter same outer shell so 2p

i.e. n= 2 l= 1