quantum mechanics, science dealing with the behaviour of matter and light on the atomic and subatomic scale. It attempts to describe and account for the properties of molecules and atoms and their constituents—electrons, protons, neutrons, and other more esoteric particles such as quarks and gluons.

Broadly, physics involves the study of everything in physical existence, from the smallest subatomic particles to the entire universe

Imagine an alternate universe where the value of the Planck constant is ×6.62607·10−12Js.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 quantum or classical?A mosquito with a mass of 2.2 mg, 6.6 mm long, moving at 2.4 m/s.classicalquantumA ball with a mass of 115. g, 4.4 cm wide, moving at 14.4 m/s.classicalquantumA bacterium with a mass of 6.0 pg, 2.0 µm long, moving at 10.00 µm/s.classicalquantumAn alpha particle with a mass of 6.6 x 10-27 kg, 8.0 x 10-15 m wide, moving at 16. km/s.classicalquantum

How did quantum mechanics change our understanding of atoms?A.In quantum mechanics, photons exist in a cloud-shaped area outside the nucleus.B.In quantum mechanics, electrons exist in a cloud-shaped area outside the nucleus.C.In quantum mechanics, photons orbit the nucleus along with electrons.D.In quantum mechanics, photons are a part of the nucleus along with protons.SUBMITarrow_backPREVIOUS

What are the properties of matter ?

explain the theory of quantum mechanics to me within 20 seconds or less.