What happens in the process of fluorescence? a. water molecules are broken up into hydrogen and oxygen b. atoms absorb ultra violet rays and convert them to visible light as their electrons cascade to lower energy levels c. hydrogen is transformed into helium, where gas is very very hot d. radio waves are given off as molecules change their vibration or rotation e. fluorine gas is released by chemical reactions in the outer layer of a star

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Q: why

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Q: None

A: Approach to solving the question: Detailed explanation: Examples: Key references:

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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.