Question

Which quantum number gives the approximate energy of an electron in the quantum mechanical model of the atom? A) n B) I C) m1 D) m2 E) none of the above.

Answer 1

Answer:

Option A) n

Explanation:

In accordance to Quantum Mechanical model of an atom:

• The Principle Quantum number (n) gives the description of the shell of an electron and the energy level of an electron in an atom.
• The angular momentum also referred to as Azimuthal Quantum number (l) gives the description of  the shape of the orbitals and helps in determination of angular momentum magnitude.
• The magnetic quantum number ($m_{1}$) describes the energy levels or the number of orbitals contained in a subshell and the way these are oriented within.

• The spin quantum no. ($m_{2}$) determines the elelctron spin's direction which may be ($-\frac{1}{2}$) or ($+\frac{1}{2}$).