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The maximum number of electrons that can...

The maximum number of electrons that can have principal quantum number n=3 and spin quantum number:
`m_(s)=-(1)/(2)` is

Text Solution

Verified by Experts

The correct Answer is:
9
Number of electrons `(n=3)=2n^(2)=18`. Half of these electrons will have anticlockwise spin, i.e., `m_(s) =-(1)/(2)`, i.e., 9 electrons.
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Knowledge Check

  • The total number of orbitals in a shell having principal quantum number 'n' is

    A
    2 n'
    B
    n^2'
    C
    2 n^2',
    D
    n+1'

  • The number of electrons in an atom that may have the quantum numbers n = 3 and m_(s) = + (1)/(2) is

    A
    32
    B
    9
    C
    18
    D
    16

  • Assertion : The maximum number of electrons in the shell with principal quantum number nis equal to 2n^(2) ?. Reason : Two electrons in an orbital have the same value of three quantum numbers n, l and m, but must have different spin quantum numbers.

    A
    If both (A) and (R) are correct and (R) is the correct explanation of(A).
    B
    If both (A) and (R) are correçt, but (R) is not the correct explanation of (A).
    C
    If (A) is correct, but (R) is incorrect.
    D
    If both (A) and (R) are incorrect.

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