i need help solving these. thanks 1. Which of the following is a correct set of

Question

i need help solving these. thanks

1. Which of the following is a correct set of quantum numbers for an electron in a 3d orbital? 2. In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed? 3. Which one of the following sets of quantum numbers can correctly represent a 3p orbital? The orbital diagram for a ground-state nitrogen atom is 4. Which ground-state atom has an electron configuration described by the following orbital diagram? 5. How many unpaired electrons does a ground-state atom of sulfur have? 6. Which element has the following ground-state electron configuration? 7. Which element has the following ground-state electron configuration? 8. The electron configuration of a ground-state Co atom is 9. 10. 11. The electron configuration of a ground-state vanadium atom is 12. How many electrons are there in the 3rd principal energy level (n = 3) of a phosphorus Atom ?

Explanation / Answer

Solution :-

Q1) 3d orbital means n = 3 and l = 2

So the correct set of the quantum number is as shown in the option ‘E’

Q2) For the question 2 the set of the quantum which is not allowed is the set shown in the option ‘e’

Because when n= 3 then l cannot be 3 the values of the l depends on the n that l is 0 to (n-1) so when n = 3 then possible values of the l are 0,1 and

So the set ‘e’ is not allowed.

Q3 a) 3p orbital means n= 3 and p orbital means l = 1

So the correct set of the quantum numbers is shown in the option ‘D’

That is n=3 , l = 1 and ml = -1

Q3 b) ) Nitrogen have 7 electrons so its electron configuration is 1s2 2s2 2p3

So the correct orbital diagram is shown in the option ‘a’

Q4) In the given orbital diagram it shows electrons as [Ar] 4s2 3d10 4p5

Means it has total 18 + 2 + 10+5 = 35 electrons so the element with the 35 electrons is the Br

So it’s the Br element with given electronic configuration orbital diagram.

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