The molecule N₂ does not show an absorption in an IR spectrum because the dipole moment of the molecule does not change with the absorption of IR energy.

Name: The molecule N 2 does not show an absorption in an IR spectrum because the dipole moment of the molecule does not change with the absorption of IR energy.
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N₂ is a homonuclear diatomic molecule with no permanent dipole moment, and its symmetric stretching does not change the dipole moment, making it inactive in IR spectroscopy.

The Molecule N2 Does Not Show an Absorption in an IR

The Molecule N₂ Does Not Show an Absorption in an IR