520.3 kJ/mol. Use this to find the energy of the 2p-orbitals in Li. For sodium, the higher-energy photon is emitted when the electron drops from one of the 3p-orbitals to the 3s-orbital, while the lower energy photon is emitted when the electron drops from
520.3 kJ/mol. Use this to find the energy of the 2p-orbitals in Li. For sodium, the higher-energy photon is emitted when the electron drops from one of the 3p-orbitals to the 3s-orbital, while the lower energy photon is emitted when the electron drops from
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter2: Atomic Structure And Periodicity
Section: Chapter Questions
Problem 8RQ: What is the difference between core electrons and valence electrons? Why do we emphasize the valence...
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use the photon energies (Li E = 178.428 KJ/mol) to determine the valence orbital energies for both Li and
Na. For lithium, the transition is from the 2p- to the 2s-orbital, and the 2s-orbital energy
is –520.3 kJ/mol. Use this to find the energy of the 2p-orbitals in Li. For sodium, the
higher-energy photon is emitted when the electron drops from one of the 3p-orbitals to
the 3s-orbital, while the lower energy photon is emitted when the electron drops from
one of the 3d-orbitals to one of the 3p-orbitals. Use these facts, along with the known
energy of the 3s-orbital (–495.8 kJ/mol), to find the energies of the 3p- and 3d-orbitals.
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