Question

Magnetic quantum number specifies orientation of orbitals in space.

Answer 1

Hint: There are 4 quantum numbers that specify the structure of an atom, or the location of electrons in an atom. The quantum numbers are principle, secondary, magnetic and spin. The magnetic quantum number tells us about the orientation of orbitals in space; we have to find that this statement is true or false.

Complete answer:
The structure of an atom consists of electrons that are negatively charged. In an atom, the address of these electrons can be specified by the four quantum numbers. The four quantum numbers are principle ‘n’ that gives the shell in which the electron is present. Azimuthal or secondary quantum number $'\ell '$ tells the sub shell in which the electron is present. The spin quantum number’ tells the spin motions of an electron. While, the magnetic quantum number ‘m’ tells the orbital and the orientation of an electron in an orbital, also it explains Zeeman and Stark effect.
An electron when placed in an external magnetic field experiences an influence due to the internal movement of electrons, this is called Zeeman Effect. So, under the influence of the magnetic field the electrons are capable of orienting themselves into the subshells and the orbitals in space.
Hence, the statement that the magnetic quantum number specifies the orientation of orbitals in space is true.

Note:
The number of orbitals in a given shell ‘n’ is given by ${{n}^{2}}$. The number of subshells is given as (n – 1). The magnetic quantum number can also give the angular momentum of an electron in an orbit whose value is$mvr=\dfrac{nh}{2\pi }$ . This is the quantized value of the Z component of angular momentum of the electron.