If you put 120 volts of electricity through a pickle, the picklewill smoke and start glowing orange-yellow. The light is emittedbecause sodium ions in the pickle become excited; theirreturn to the ground state results in light emission. (a) Thewavelength of this emitted light is 589 nm. Calculate its frequency.(b) What is the energy of 1.00 mol of these photons(a mole of photons is called an Einstein)? (c) Calculate theenergy gap between the excited and ground states for thesodium ion. (d) If you soaked the pickle for a long time in adifferent salt solution, such as strontium chloride, would youstill observe 589-nm light emission?

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A:

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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.