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Chemist20
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Is it the same as the total angular momentum quantum number ?
ZealScience said:What do you mean? Usually, in QM, J is used to describe the total angular momentum operator and the corresponding eigenvalue, same as orbital angular momentum L
The quantum number, however, does not equal to the value of total angular momentum. Orbital angular momentum number l, for example, usually represents (I can't remember the exact notation) total of l(l+1).
The rotational quantum number J is a quantum number that describes the rotational energy levels of a molecule. It is a whole number that ranges from 0 to infinity and is related to the angular momentum of the molecule.
The rotational quantum number J is determined by the shape of the molecule and the number of atoms it contains. It is also influenced by the type of bond present in the molecule, such as single, double, or triple bonds.
The rotational quantum number J is significant because it helps to define the energy levels of a molecule. It also determines the spacing between the energy levels, which can be measured through spectroscopy.
The rotational quantum number J affects the rotational energy of a molecule, which in turn affects its physical properties. For example, molecules with higher J values have higher rotational energies and are more likely to undergo rotational transitions.
Yes, the rotational quantum number J can change when a molecule undergoes a rotational transition, such as when it absorbs or emits a photon. J can also change when the molecule rotates faster or slower due to changes in temperature or pressure.