Which of the following is a correct set of quantum numbers for an electron in a 5f orbital and please explain why a)n=5, l=3, ml=+1 b)n=4, l=3, ml=0 c)n=4, l=2, ml=+1 d)n=5, l=4, ml=3
Asked by maham237 @ in Chemistry viewed by 357 People
Answered by maham237 @
Answer:
- Option A) n = 5, ℓ= 3, mℓ= +1 is a correct set of quantum numbers for an electron in a 5f orbital.
Explanation:
1) n is the main or principal quantum number. It is an integer number from 1. So, it may be 1, 2, 3, 4, 5, ...
2) In 5f, the principal quantum number is n = 5.
So, the possible correct choices are A) n = 5, ℓ = 3, mℓ = +1 or D) n = 5, ℓ = 4, mℓ = 3.
3) ℓ is the second or the orbital angular momentum quantum number.
ℓ can be an integer number from 0 to n - 1.
So, when n = 5, ℓ can be 0, 1, 2, 3 or 4, only one of those.
This quantum number is also the subshell or kind of orbital.
This summarizes the relation between the number and the letter that identifies the kind of orbital:
ℓ kind of orbital
0 s
1 p
2 d
3 f
So, for an electron in 5f orbital, the first two quantum numbers are n = 5, ℓ = 3.
With that, you already know that the correct choice can only be A) n = 5, ℓ = 3, mℓ = +1.
4) mℓ is the third or the magnetic quantum number. This quantum number can take the values from - ℓ to + ℓ. So, for ℓ = 3 (or f) , it can be -3, -2, -1, 0, +1, +2, or +3.
Hence, A) n = 5, ℓ= 3, mℓ= +1 is a correct set of quantum numbers for an electron in a 5f orbital.
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