UPTET Paper 2 Math and Science 2016 Solved Paper

Concept:The magnetic quantum number ($m_l$) describes the spatial orientation of an orbital relative to a set of coordinate axes.Explanation:Quantum numbers are used to specify each atomic orbital and the electrons in an atom. There are four types:- Principal quantum number ($n$) determines size and energy of the orbital.- Azimuthal quantum number ($l$) determines the three‑dimensional shape of the orbital.- Magnetic quantum number ($m_l$) gives the orientation of the orbital in space. Its allowed values range from $-l$ to $+l$.- Spin quantum number ($s$) indicates the spin direction of the electron ($+\frac{1}{2}$ or $-\frac{1}{2}$).Thus, the magnetic quantum number specifically tells how an orbital is oriented.Answer:Option B: Orientation of orbitals.