Magnetic quantum number specifies:
Size of orbitals
shape of orbitals
Orientation of orbitals
nuclear stability
Magnetic quantum number defines orbitals, hence the orientation whether px,py or pz.
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
(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.