how can we determine the spin quantum no. of an atomic orbital?

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Solution

Only a maximum of two electrons can reside in an orbital and that with opposite spins. The electron with up spin (which means it rotates in clockwise direction) is given a spin quantum number value of +1/2 while the electron with down spin (anti-clockwise rotation) is given a value of -1/2.

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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.

How many d-electrons in Cu (I) cation (At. No. = 29) can have the spin quantum number (-1/2)?

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