Electronic transitions and energy | AP Chemistry | Khan Academy

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Electronic transitions occur in atoms and molecules due to the absorption or emission of electromagnetic radiation (typically UV or visible). The energy change associated with a transition is related to the frequency of the electromagnetic wave by Planck's equation, E = h𝜈. In turn, the frequency of the wave is related to its wavelength and the speed of light by the equation c = 𝜆𝜈. View more lessons or practice this subject at www.khanacadem...
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[@deryaadil4344]

How would you do this without a calculator as expected on the MCAT?

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[@Andrea_Zagaglia]

Thanks sir. Just a question: is the energy difference between two energy levels a constant? And between two orbitals?

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I just want to know that, why only eight electron is need in the outermost shell for being a noble element......Is there any reason behind it.............

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The joule is equal to one?

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