The magnetic quantum number of an atom is related to the :

size of the orbital

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spin angular momentum

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orbital angular momentum

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orientation of the orbital in space

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Solution

The correct option is D orientation of the orbital in space
It describes the orientations of the subshells. It can have values from l to +l including zero, i.e., total (2l + 1) values. Each value corresponds to an orbital. s-subshell has one orbital, p-subshell three orbitals, d-subshell five orbitals and f-subshell has seven orbitals.

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Question 21

Which of the following statements concerning the quantum numbers are correct ?

(a) The angular momentum quantum number determines the three-dimensional shape of the orbital

(b) The principal quantum number determines the orientation and energy of the orbital

(d). Spin quantum number of an electron determines the orientation of the spin of electron relative to the chosen axis.

C r^{3 +}

= \sqrt{s (s + 1)} h

= \sqrt{l (l + 1)} h

\frac{1}{2}

= (2 \sum s + 1)

2 p

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