The energy (in joules) of an electron energy level in the Bohr atom is given by the expression: [tex]E_{n}[/tex]= -2.179 x [tex]10^-18/n^2 J[/tex]where n is the principal quantum number for the energy level. What is the frequency in Hz of the electromagnetic radiation absorbed when an electron is raised up from level with n = 4 to that with n = 9?(adsbygoogle = window.adsbygoogle || []).push({});

I'm unsure of the the formula to use, or even the first step. Any ideas??

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# Electromagnetic Radiation

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