iv. KCL 7696 v. FeCl 27.9 and Gras (c) The Bohr Model was used in Part A to predict the emission wavelengths of hydrogen

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Iv Kcl 7696 V Fecl 27 9 And Gras C The Bohr Model Was Used In Part A To Predict The Emission Wavelengths Of Hydrogen 1 (43.35 KiB) Viewed 45 times

iv. KCL 7696 v. FeCl 27.9 and Gras (c) The Bohr Model was used in Part A to predict the emission wavelengths of hydrogen, which only as 1s electrons in its ground state. When hydrogen is excited and electrons fall back down toward the nucleus, it can emit photons. For hydrogen, Eqn. 2.1 is excellent at predicting the energy difference between these shells and therefore the emission wavelengths for the first element (atomic number Z = 1). However, we mentioned that the equation begins to fail for elements larger than helium. A lithim cation Li", which is the species you tested in LiCl, has an atomic number Z= 3 and is somewhat similar in size to helium. In order to use Eqn. 2.1 for elements other than hydrogen, the atomic number must be added to the equation as shown in Eqn. 2.6. AE-2.18x10-18 J 2² (2.6) For the LiCl peaks observed, complete the observed wavelength and energy in the table below. Then, apply Eqn. 2.6 to determine the likely initial and nyinal, based on the calculated energy. Table 2.3: Li Observed Wavelength Observed Energy (nm) Emission Spectra Calculated Energy Determined Determined J J Bieitial final d sentences describe whether the the Bohr Model applies to a larger element.