Ap Chemistry Michalek - Unit 7: Atomic Structure And Periodicity Worksheet Page 10
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29AP Chemistry--Michalek
10
Unit 7 Atomic Structure and Periodicity
Energy levels available to the electrons in the hydrogen atom:
Bohr’s Model Equation:
n is an integer
Z is the nuclear charge
Example
Calculate the energy required to excite the hydrogen electron from level n = 1 to level n=2. Also calculate the
wavelength of light that must be absorbed by a hydrogen atom in its ground state to reach this excited state.
Points about Bohr’s Model
1. The model correctly fits that quantized energy levels of the hydrogen atom and postulates only certain allowed
circular orbits for the electron.
2. As the electron becomes more tightly bound, its energy becomes more negative related to the zero-energy
reference state (corresponding to the electron being at infinite distance from the nucleus). As the electron is
brought closer to the nucleus, energy is released for the system.
Example
Calculate the energy required to remove the electron for a hydrogen atom in its ground state.
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