Consider the transition of the electron in the hydrogen atom from n = 4 to n = 9. a) Is ΔE for this process positive or negative? b) Will the light be absorbed or emitted? c) Does this transition correspond to an endothermic or exothermic reaction?

Consider the transition of the electron in the hydrogen atom from n = 4 to n = 9. a) Is ΔE for this process positive or negative? b) Will the light be absorbed or emitted? c) Does this transition correspond to an endothermic or exothermic reaction?

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter5: Electrons In The Atom

Section5.1: Light And Quantized Energy

Problem 13SSC

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Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.

Question

Consider the transition of the electron in the hydrogen atom from n = 4 to n = 9.

a) Is ΔE for this process positive or negative?

b) Will the light be absorbed or emitted?

c) Does this transition correspond to an endothermic or exothermic reaction?

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