Imagine an alternate universe where the value of the Planck constant is 6.62607 × 10 J.s. In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which objects would act like everyday objects, and be adequately described by classical mechanics? object An eyelash mite with a mass of 11.0 µg, 395 um wide, moving at 50. μm/s. A ball with a mass of 95. g, 5.7 cm wide, moving at 23.6 m/s. An atom with a mass of 1.0 x 10-26 kg, 175. pm wide, moving at 360. m/s. A human with a mass of 87. kg, 1.4 m high, moving at 1.9 m/s. quantum or classical? classical quantum Oclassical O quantum classical quantum Oclassical quantum

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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.