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12 May, 20:33

Which of the following statements is/are correct?

1.) The angular momentum quantum number, l, of an electron in an s orbital is always equal to 0.

2.) The magnetic quantum number, m, of an electron in a p orbital is + 1,0, or - 1.

3.) The principle quantum, n, of an electron in a d orbital must be equal to or greater than 3.

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  1. 12 May, 22:47
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    All are correct

    Explanation:

    1) The angular momentum quantum number, l, are the subshells within a shell (principle quantum number) it talks about the "form" of an orbital, the number itself tells you about the number of angular nodes (a plane without electronic density). It starts at l=0 where you don't see any nodes and it takes the form of an sphere, and we knowing it bu another name an s-orbital. It takes values up to n-1.

    l=0 (sphere - s-orbital)

    l=1 (p-orbital)

    l=2 (d-orbital)

    2) The magnetic quatum number, ml relates to the number of orbitals within a subshell then it is related with l, taking values form - l to l incluing 0.

    For l=0 (s-orbital) ml=0

    For l=1 (p-orbital) ml=1,0,-1

    For l=2 (d-orbital) ml=2,1,0,-1,-2

    3) In every shell we are restricted by the total number of nodes of any orbital. Then if we want a d-orbital with l=3 we need at least 3 plane nodes only achievable with n=3 at least.
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