Question

: what is the effect of rotational energy levels of a molecule of an atom is replaced by its heavier isotope?

Answer 1

Answer:

When an atom in a molecule is changed to an isotope, the mass number will be changed, so µ will be affected, but k will not (mostly). This change in reduced mass will affect the vibrational modes of the molecule, which will affect the vibrational spectrum

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Answer 2

the effect of rotational energy level around COM