Which of the following statements concerning the quantum numbers …

MCQ

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

A
Angular quantum number determines the three dimensional shape of the orbital.
B
The principal quantum number determines the orientation and energy of the orbital.
C
Magnetic quantum number determines the size of the orbital.
D
Spin quantum number of an electron determines the orientation of the spin of electron relative to the chosen axis.

✓

Answer

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

Explanation:

Azimuthal quantum number l is also known as orbital angular momentum or subsidiary quantum number. It determines three-dimensional shape of the orbital.
The principal quantum number determines the size of the orbit.
Magnetic quantum number determines the orientation of the electron cloud in a sub shell.
An electron spins around its own’ axis, much in a similar way as earth spins around its own axis while revolving around the sun. In other words, an electron has, besides charge and mass, intrinsic spin angular quantum number.

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