Explain why the atomic spectra are line spectra whereas the molecular spectra are band spectra.
Atomic spectra appear as line spectra because atoms have discrete, quantized energy levels for their electrons. When an electron in an atom transitions between these fixed energy levels, it emits or absorbs a photon with a precise energy corresponding ___ ____ ______ ____ ______ _____ _______ __________ ________ ___ ___ __________.
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Isomer shift
A photon of visible light has a wavelength of . Calculate its
(i) wavenumber
(ii) frequency
(iii) energy per mol
has bond length
. Calculate the wavenumbers of the first four lines in its microwave spectrum.
[Given: mass of C=12.000 u and mass of N=14.007 u]
What makes TMS a molecule of choice to act as a reference in the NMR spectrometry?
Calculate the number of vibrational modes for a molecule of methane.
Assuming that the force constants of H-Cl and D-Cl are the same, calculate the fundamental vibration frequency of D-Cl if that of H-Cl is .
The rotational Raman spectrum of a diatomic molecule has the first line of a series of Stokes and anti-Stokes lines at , relative of the
of incident light. What would be its bond length.