molecular energies and spectroscopy Flashcards
what type of spectra does transition between electronic energy levels give
atomic spectra
how can u calculate the electronic energy levels in atoms
derive an expression for wave function
solve using the schrödinger equation
what is translational energy
movement of a molecule as a whole
aka moving it around the screen
what is rotational energy
when the molecule rotates
teddy bear roll
vibrational energy
when bond lengths and bond angles change
the energy associated with translation, rotation and vibration are alll
quantiseddddd
order of energy from low to high according to translation rotation vibration electronic
translation
rotation
vibration
electronic
like electrons, atoms and molecules have ….. properties
wave properties
particle properties
the energy between rotation, vibrational and electronic transitions can be observed and therefore they are
large enough to be observed unlike translational energy transitions
give rise to spectra
do translations happen simultaneously
yes!!!
rotational, vibrational and electronic transitions all occur simultaneously
each electronic energy level has
it’s own stack of vibrational energy levels and therefore many stacks of rotational energy levels
vibrational energy levels have
a stack of rotational energy levels.
motion of a molecule can be seen as
translation
rotation
vibration
why and how does spectra appear at diff places on the electromagnetic spectrum
due to energy levels requiring different amounts of energy for transitions
(eg: rotation needs microwaves + IR)
vibrational needs IR
electronic needs UV AND VIS
